{"title":"Metering Pump Check Valves","description":"\u003cp\u003eCheck valves for chemical metering and dosing pumps, in 316 stainless and PVC with chemically compatible seals, sized to common pump connections. This is Apex's deepest check-valve niche, the correct part for water treatment, chemical feed and sodium hypochlorite service. See the \u003ca href=\"\/pages\/check-valves-guide\"\u003echeck valve selection guide\u003c\/a\u003e.\u003c\/p\u003e","products":[{"product_id":"18-in-line-check-valve-vert-or-horiz-947140","title":"1\/8 in. Inline Check Valve, Vertical or Horizontal","description":"\u003cp\u003eThe \u003cstrong\u003e1\/8 in. Inline Check Valve, Vertical or Horizontal\u003c\/strong\u003e (#947140) is a spring-loaded brass inline check valve that allows flow in one direction and closes automatically to prevent backflow. Buna-N (NBR) seals suit water, oils, and many chemical services. Compact inline body installs in any orientation — vertical or horizontal — without special mounting.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBody Material\u003c\/td\u003e\n\u003ctd\u003eBrass body\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSpring Material\u003c\/td\u003e\n\u003ctd\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSeal \/ O-ring\u003c\/td\u003e\n\u003ctd\u003eBuna-N (NBR)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePressure Rating\u003c\/td\u003e\n\u003ctd\u003e150–500 PSI depending on model\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e−20°F to 250°F (−29°C to 121°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eAny orientation (vertical or horizontal)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e947140\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eBrass body \/ Stainless spring construction\u003c\/li\u003e\n  \u003cli\u003eSpring-loaded — closes automatically when flow stops or reverses\u003c\/li\u003e\n  \u003cli\u003eInstall in any orientation — vertical or horizontal\u003c\/li\u003e\n  \u003cli\u003eBuna-N (NBR) seals — compatible with water, oils, and most process fluids\u003c\/li\u003e\n  \u003cli\u003eCracking pressure factory-set for reliable sealing\u003c\/li\u003e\n  \u003cli\u003eCompact inline form factor — minimal installation space required\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCommon Applications\u003c\/h2\u003e\n\u003cp\u003eUsed as backflow preventers in chemical metering pump systems, water treatment injection points, pump discharge lines, and process piping where reverse flow would contaminate upstream systems or damage equipment.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Resources\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003ca href=\"\/pages\/check-valve-types-explained\"\u003eCheck Valve Types: Swing, Spring, Wafer, Ball\u003c\/a\u003e — Understand the differences\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/pages\/how-to-choose-the-right-valve\"\u003eHow to Choose the Right Valve\u003c\/a\u003e — Application selection guide\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/collections\/brass-check-valves\"\u003eShop Brass Check Valves\u003c\/a\u003e — Full brass check valve range\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- apex-guide-links --\u003e\n\u003cdiv style=\"margin-top:24px;padding:16px 20px;border:1px solid #ddd;border-radius:6px;background:#fafafa;\"\u003e\n\u003ch3 style=\"margin:0 0 10px;font-size:1.05rem;\"\u003eExpert Guides for This Product\u003c\/h3\u003e\n\u003cul style=\"margin:0;padding-left:20px;\"\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-installation-direction-orientation\"\u003eCheck Valve Orientation \u0026amp; Installation\u003c\/a\u003e — flow direction and mounting rules\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-sizing-guide\"\u003eCheck Valve Sizing Guide\u003c\/a\u003e — why line size isn't valve size\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-slamming-water-hammer\"\u003eSlamming \u0026amp; Water Hammer\u003c\/a\u003e — causes and fixes\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-leaking-diagnosis\"\u003eCheck Valve Leaking?\u003c\/a\u003e — diagnose and fix it\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-chattering-noise\"\u003eCheck Valve Chattering\u003c\/a\u003e — the sizing problem nobody checks\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/buna-vs-viton-check-valve-seats\"\u003eBuna vs. Viton Seats\u003c\/a\u003e — which elastomer fits your media\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- \/apex-guide-links --\u003e","brand":"Midland Industries","offers":[{"title":"Default Title","offer_id":48629262221527,"sku":"947140","price":19.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/4152\/8791\/files\/MIDLANDINDUSTRIES_947140_7d826c38-73c7-434d-91a5-96f207c5cda3.jpg?v=1778884478"},{"product_id":"14-brass-in-line-check-valve-944401","title":"1\/4 in. Brass Inline Check Valve, Buna-N | 944401","description":"\u003cp\u003eThe 1\/4 in. brass inline check valve (part \u003cstrong\u003e944401\u003c\/strong\u003e) provides compact, spring-loaded backflow prevention with a Buna-N (NBR) soft seat for bubble-tight shutoff. Rated 400 psi WOG with a low 1\/2 psi cracking pressure, polyetherimide disc, and a patented disc guide that prevents side loading. Female NPT both ends. Made in Italy.\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer Part Number (MPN)\u003c\/td\u003e\n\u003ctd\u003e944401\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Size\u003c\/td\u003e\n\u003ctd\u003e1\/4 in.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eValve Type\u003c\/td\u003e\n\u003ctd\u003eInline check valve (spring-loaded poppet), brass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnd Connections\u003c\/td\u003e\n\u003ctd\u003eFemale NPT × Female NPT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePressure Rating\u003c\/td\u003e\n\u003ctd\u003e400 psi WOG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e+10°F to 210°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCracking Pressure\u003c\/td\u003e\n\u003ctd\u003e1\/2 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeat \/ Seal\u003c\/td\u003e\n\u003ctd\u003eBuna-N (NBR) — water, oils, general purpose\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisc\u003c\/td\u003e\n\u003ctd\u003ePolyetherimide — corrosion and abrasion resistant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch2\u003eDimensions\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBore Diameter\u003c\/td\u003e\n\u003ctd\u003e0.39\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.22 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch2\u003eMaterials of Construction\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody \u0026amp; End Connection\u003c\/td\u003e\n\u003ctd\u003eBrass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisc\u003c\/td\u003e\n\u003ctd\u003ePolyetherimide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeat\u003c\/td\u003e\n\u003ctd\u003eNBR (Buna-N)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpring\u003c\/td\u003e\n\u003ctd\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch2\u003ePerformance \u0026amp; Testing\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eLow 1\/2 psi cracking pressure — opens with minimal upstream pressure\u003c\/li\u003e\n\u003cli\u003eSpring-loaded for fast seating; perfect seating at both high and low pressure\u003c\/li\u003e\n\u003cli\u003ePatented disc guide prevents side loading — stable, chatter-resistant operation\u003c\/li\u003e\n\u003cli\u003eCompact, high-capacity design with a head-loss-minimizing flow profile\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot lead-free\u003c\/strong\u003e — for potable water supply lines, choose a lead-free certified valve (see Lead-Free Valves in our Valves menu)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"series-sizes\"\u003e\n\u003ch3\u003eOther Sizes in This Series\u003c\/h3\u003e\n\u003cp\u003eBrass Inline Check Valve, Buna-N, Female NPT (1\/4\"–4\"; 400 WOG through 2\", 175 WOG above). Jump to another size or add it straight to your cart:\u003c\/p\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePrice\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCart\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e1\/4 in. (this page)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e944401\u003c\/td\u003e\n\u003ctd\u003e$17.99\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/3-8-in-brass-inline-check-valve-buna-n-944402\"\u003e3\/8 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944402\u003c\/td\u003e\n\u003ctd\u003e$19.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48741841010903:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/12-brass-in-line-check-valve-nbr-944403\"\u003e1\/2 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944403\u003c\/td\u003e\n\u003ctd\u003e$20.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48629262483671:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/3-4-in-brass-inline-check-valve-buna-n-944404\"\u003e3\/4 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944404\u003c\/td\u003e\n\u003ctd\u003e$29.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48741780947159:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/1-in-brass-inline-check-valve-buna-n-944405\"\u003e1 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944405\u003c\/td\u003e\n\u003ctd\u003e$37.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48741841043671:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/1-14-brass-in-line-check-nbr-944406\"\u003e1-1\/4 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944406\u003c\/td\u003e\n\u003ctd\u003e$55.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48629262745815:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/1-1-2-in-brass-inline-check-valve-buna-n-944407\"\u003e1-1\/2 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944407\u003c\/td\u003e\n\u003ctd\u003e$85.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48741841273047:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/2-in-brass-inline-check-valve-buna-n-944408\"\u003e2 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944408\u003c\/td\u003e\n\u003ctd\u003e$120.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48741850579159:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/2-1-2-in-brass-inline-check-valve-buna-n-944409\"\u003e2-1\/2 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944409\u003c\/td\u003e\n\u003ctd\u003e$283.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48741850644695:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/3-in-brass-inline-check-valve-buna-n-944410\"\u003e3 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944410\u003c\/td\u003e\n\u003ctd\u003e$355.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48741854314711:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/4-in-brass-inline-check-valve-buna-n-944411\"\u003e4 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944411\u003c\/td\u003e\n\u003ctd\u003e$630.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48741854380247:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2\u003eTypical Applications\u003c\/h2\u003e\u003cp\u003eBackflow prevention on water distribution, pump discharge, compressed air, and light oil lines; recirculation loops and gravity-fed systems where the 1\/2 psi cracking pressure matters; general-purpose industrial and irrigation service. Not for potable water supply (not lead-free).\u003c\/p\u003e\n\u003ch2\u003eCross-References \u0026amp; Interchange\u003c\/h2\u003e\u003cp\u003eReplacing another brand's 1\/4 in. brass inline check valve? Match nominal size, end connections, cracking pressure, and pressure rating for a direct fit — or send us your part number and we will confirm the interchange. Corrosive chemicals? Step up to the \u003ca style=\"color:#FE8C03\" href=\"\/products\/1-4-in-316-stainless-steel-inline-check-valve-949401\"\u003e1\/4 in. 316 SS inline check valve (949401)\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eAvailability\u003c\/h2\u003e\u003cp\u003eIn stock — ships direct from the manufacturer, typically 1–3 business days.\u003c\/p\u003e\n\u003ch2\u003eTechnical Resources\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-types-explained\"\u003eCheck Valve Types Explained (Swing vs. Spring vs. Wafer)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca style=\"color:#FE8C03\" href=\"\/pages\/how-to-choose-the-right-valve\"\u003eHow to Choose the Right Valve\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca style=\"color:#FE8C03\" href=\"\/pages\/valve-pressure-temperature-ratings-chart\"\u003eValve Pressure \u0026amp; Temperature Ratings Chart\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- apex-guide-links --\u003e\n\u003cdiv style=\"margin-top:24px;padding:16px 20px;border:1px solid #ddd;border-radius:6px;background:#fafafa;\"\u003e\n\u003ch3 style=\"margin:0 0 10px;font-size:1.05rem;\"\u003eExpert Guides for This Product\u003c\/h3\u003e\n\u003cul style=\"margin:0;padding-left:20px;\"\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-installation-direction-orientation\"\u003eCheck Valve Orientation \u0026amp; Installation\u003c\/a\u003e — flow direction and mounting rules\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-sizing-guide\"\u003eCheck Valve Sizing Guide\u003c\/a\u003e — why line size isn't valve size\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-slamming-water-hammer\"\u003eSlamming \u0026amp; Water Hammer\u003c\/a\u003e — causes and fixes\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-leaking-diagnosis\"\u003eCheck Valve Leaking?\u003c\/a\u003e — diagnose and fix it\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-chattering-noise\"\u003eCheck Valve Chattering\u003c\/a\u003e — the sizing problem nobody checks\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/buna-vs-viton-check-valve-seats\"\u003eBuna vs. Viton Seats\u003c\/a\u003e — which elastomer fits your media\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- \/apex-guide-links --\u003e","brand":"Midland Industries","offers":[{"title":"Default Title","offer_id":48629262287063,"sku":"944401","price":18.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/4152\/8791\/files\/MIDLANDINDUSTRIES_944401_cc9505a2-e925-4e17-b472-218bb8ae0d76.jpg?v=1778884479"},{"product_id":"12-brass-in-line-check-valve-nbr-944403","title":"1\/2 in. Brass Inline Check Valve, Buna-N | 944403","description":"\u003cp\u003eThe 1\/2 in. brass inline check valve (part \u003cstrong\u003e944403\u003c\/strong\u003e) provides compact, spring-loaded backflow prevention with a Buna-N (NBR) soft seat for bubble-tight shutoff. Rated 400 psi WOG with a low 1\/2 psi cracking pressure, polyetherimide disc, and a patented disc guide that prevents side loading. Female NPT both ends. Made in Italy.\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer Part Number (MPN)\u003c\/td\u003e\n\u003ctd\u003e944403\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Size\u003c\/td\u003e\n\u003ctd\u003e1\/2 in.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eValve Type\u003c\/td\u003e\n\u003ctd\u003eInline check valve (spring-loaded poppet), brass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnd Connections\u003c\/td\u003e\n\u003ctd\u003eFemale NPT × Female NPT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePressure Rating\u003c\/td\u003e\n\u003ctd\u003e400 psi WOG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e+10°F to 210°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCracking Pressure\u003c\/td\u003e\n\u003ctd\u003e1\/2 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeat \/ Seal\u003c\/td\u003e\n\u003ctd\u003eBuna-N (NBR) — water, oils, general purpose\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisc\u003c\/td\u003e\n\u003ctd\u003ePolyetherimide — corrosion and abrasion resistant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch2\u003eDimensions\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBore Diameter\u003c\/td\u003e\n\u003ctd\u003e0.60\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.32 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch2\u003eMaterials of Construction\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody \u0026amp; End Connection\u003c\/td\u003e\n\u003ctd\u003eBrass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisc\u003c\/td\u003e\n\u003ctd\u003ePolyetherimide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeat\u003c\/td\u003e\n\u003ctd\u003eNBR (Buna-N)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpring\u003c\/td\u003e\n\u003ctd\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch2\u003ePerformance \u0026amp; Testing\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eLow 1\/2 psi cracking pressure — opens with minimal upstream pressure\u003c\/li\u003e\n\u003cli\u003eSpring-loaded for fast seating; perfect seating at both high and low pressure\u003c\/li\u003e\n\u003cli\u003ePatented disc guide prevents side loading — stable, chatter-resistant operation\u003c\/li\u003e\n\u003cli\u003eCompact, high-capacity design with a head-loss-minimizing flow profile\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot lead-free\u003c\/strong\u003e — for potable water supply lines, choose a lead-free certified valve (see Lead-Free Valves in our Valves menu)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"series-sizes\"\u003e\n\u003ch3\u003eOther Sizes in This Series\u003c\/h3\u003e\n\u003cp\u003eBrass Inline Check Valve, Buna-N, Female NPT (1\/4\"–4\"; 400 WOG through 2\", 175 WOG above). Jump to another size or add it straight to your cart:\u003c\/p\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePrice\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCart\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/14-brass-in-line-check-valve-944401\"\u003e1\/4 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944401\u003c\/td\u003e\n\u003ctd\u003e$17.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48629262287063:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/3-8-in-brass-inline-check-valve-buna-n-944402\"\u003e3\/8 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944402\u003c\/td\u003e\n\u003ctd\u003e$19.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48741841010903:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e1\/2 in. (this page)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e944403\u003c\/td\u003e\n\u003ctd\u003e$20.99\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/3-4-in-brass-inline-check-valve-buna-n-944404\"\u003e3\/4 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944404\u003c\/td\u003e\n\u003ctd\u003e$29.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48741780947159:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/1-in-brass-inline-check-valve-buna-n-944405\"\u003e1 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944405\u003c\/td\u003e\n\u003ctd\u003e$37.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48741841043671:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/1-14-brass-in-line-check-nbr-944406\"\u003e1-1\/4 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944406\u003c\/td\u003e\n\u003ctd\u003e$55.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48629262745815:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/1-1-2-in-brass-inline-check-valve-buna-n-944407\"\u003e1-1\/2 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944407\u003c\/td\u003e\n\u003ctd\u003e$85.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48741841273047:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/2-in-brass-inline-check-valve-buna-n-944408\"\u003e2 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944408\u003c\/td\u003e\n\u003ctd\u003e$120.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48741850579159:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/2-1-2-in-brass-inline-check-valve-buna-n-944409\"\u003e2-1\/2 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944409\u003c\/td\u003e\n\u003ctd\u003e$283.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48741850644695:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/3-in-brass-inline-check-valve-buna-n-944410\"\u003e3 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944410\u003c\/td\u003e\n\u003ctd\u003e$355.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48741854314711:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/4-in-brass-inline-check-valve-buna-n-944411\"\u003e4 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944411\u003c\/td\u003e\n\u003ctd\u003e$630.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48741854380247:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2\u003eTypical Applications\u003c\/h2\u003e\u003cp\u003eBackflow prevention on water distribution, pump discharge, compressed air, and light oil lines; recirculation loops and gravity-fed systems where the 1\/2 psi cracking pressure matters; general-purpose industrial and irrigation service. Not for potable water supply (not lead-free).\u003c\/p\u003e\n\u003ch2\u003eCross-References \u0026amp; Interchange\u003c\/h2\u003e\u003cp\u003eReplacing another brand's 1\/2 in. brass inline check valve? Match nominal size, end connections, cracking pressure, and pressure rating for a direct fit — or send us your part number and we will confirm the interchange. Pumping fuels or hydrocarbons? The \u003ca style=\"color:#FE8C03\" href=\"\/products\/12-brass-in-line-check-viton-944403v\"\u003e1\/2 in. Viton-seal version (944403V)\u003c\/a\u003e handles fuels and runs to 325°F. Corrosive chemicals? Step up to the \u003ca style=\"color:#FE8C03\" href=\"\/products\/1-2-in-316-stainless-steel-inline-check-valve-949403\"\u003e1\/2 in. 316 SS inline check valve (949403)\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eAvailability\u003c\/h2\u003e\u003cp\u003eIn stock — ships direct from the manufacturer, typically 1–3 business days.\u003c\/p\u003e\n\u003ch2\u003eTechnical Resources\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-types-explained\"\u003eCheck Valve Types Explained (Swing vs. Spring vs. Wafer)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca style=\"color:#FE8C03\" href=\"\/pages\/how-to-choose-the-right-valve\"\u003eHow to Choose the Right Valve\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca style=\"color:#FE8C03\" href=\"\/pages\/valve-pressure-temperature-ratings-chart\"\u003eValve Pressure \u0026amp; Temperature Ratings Chart\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- apex-guide-links --\u003e\n\u003cdiv style=\"margin-top:24px;padding:16px 20px;border:1px solid #ddd;border-radius:6px;background:#fafafa;\"\u003e\n\u003ch3 style=\"margin:0 0 10px;font-size:1.05rem;\"\u003eExpert Guides for This Product\u003c\/h3\u003e\n\u003cul style=\"margin:0;padding-left:20px;\"\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-installation-direction-orientation\"\u003eCheck Valve Orientation \u0026amp; Installation\u003c\/a\u003e — flow direction and mounting rules\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-sizing-guide\"\u003eCheck Valve Sizing Guide\u003c\/a\u003e — why line size isn't valve size\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-slamming-water-hammer\"\u003eSlamming \u0026amp; Water Hammer\u003c\/a\u003e — causes and fixes\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-leaking-diagnosis\"\u003eCheck Valve Leaking?\u003c\/a\u003e — diagnose and fix it\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-chattering-noise\"\u003eCheck Valve Chattering\u003c\/a\u003e — the sizing problem nobody checks\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/buna-vs-viton-check-valve-seats\"\u003eBuna vs. Viton Seats\u003c\/a\u003e — which elastomer fits your media\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- \/apex-guide-links --\u003e","brand":"Midland Industries","offers":[{"title":"Default Title","offer_id":48629262483671,"sku":"944403","price":21.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/4152\/8791\/files\/MIDLANDINDUSTRIES_944403_dfeb6238-d4d9-434c-9b30-729215de64d2.jpg?v=1778884481"},{"product_id":"38-in-line-check-val-944429","title":"3\/8 in. Inline Check Valve","description":"\u003cp\u003eThe \u003cstrong\u003e3\/8 in. Inline Check Valve\u003c\/strong\u003e (#944429) is a spring-loaded brass inline check valve that allows flow in one direction and closes automatically to prevent backflow. Buna-N (NBR) seals suit water, oils, and many chemical services. Compact inline body installs in any orientation — vertical or horizontal — without special mounting.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBody Material\u003c\/td\u003e\n\u003ctd\u003eBrass body\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSpring Material\u003c\/td\u003e\n\u003ctd\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSeal \/ O-ring\u003c\/td\u003e\n\u003ctd\u003eBuna-N (NBR)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePressure Rating\u003c\/td\u003e\n\u003ctd\u003e150–500 PSI depending on model\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e−20°F to 250°F (−29°C to 121°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eAny orientation (vertical or horizontal)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e944429\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eBrass body \/ Stainless spring construction\u003c\/li\u003e\n  \u003cli\u003eSpring-loaded — closes automatically when flow stops or reverses\u003c\/li\u003e\n  \u003cli\u003eInstall in any orientation — vertical or horizontal\u003c\/li\u003e\n  \u003cli\u003eBuna-N (NBR) seals — compatible with water, oils, and most process fluids\u003c\/li\u003e\n  \u003cli\u003eCracking pressure factory-set for reliable sealing\u003c\/li\u003e\n  \u003cli\u003eCompact inline form factor — minimal installation space required\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCommon Applications\u003c\/h2\u003e\n\u003cp\u003eUsed as backflow preventers in chemical metering pump systems, water treatment injection points, pump discharge lines, and process piping where reverse flow would contaminate upstream systems or damage equipment.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Resources\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003ca href=\"\/pages\/check-valve-types-explained\"\u003eCheck Valve Types: Swing, Spring, Wafer, Ball\u003c\/a\u003e — Understand the differences\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/pages\/how-to-choose-the-right-valve\"\u003eHow to Choose the Right Valve\u003c\/a\u003e — Application selection guide\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/collections\/brass-check-valves\"\u003eShop Brass Check Valves\u003c\/a\u003e — Full brass check valve range\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- apex-guide-links --\u003e\n\u003cdiv style=\"margin-top:24px;padding:16px 20px;border:1px solid #ddd;border-radius:6px;background:#fafafa;\"\u003e\n\u003ch3 style=\"margin:0 0 10px;font-size:1.05rem;\"\u003eExpert Guides for This Product\u003c\/h3\u003e\n\u003cul style=\"margin:0;padding-left:20px;\"\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-installation-direction-orientation\"\u003eCheck Valve Orientation \u0026amp; Installation\u003c\/a\u003e — flow direction and mounting rules\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-sizing-guide\"\u003eCheck Valve Sizing Guide\u003c\/a\u003e — why line size isn't valve size\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-slamming-water-hammer\"\u003eSlamming \u0026amp; Water Hammer\u003c\/a\u003e — causes and fixes\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-leaking-diagnosis\"\u003eCheck Valve Leaking?\u003c\/a\u003e — diagnose and fix it\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-chattering-noise\"\u003eCheck Valve Chattering\u003c\/a\u003e — the sizing problem nobody checks\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/buna-vs-viton-check-valve-seats\"\u003eBuna vs. Viton Seats\u003c\/a\u003e — which elastomer fits your media\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- \/apex-guide-links --\u003e","brand":"Midland Industries","offers":[{"title":"Default Title","offer_id":48629262614743,"sku":"944429","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/4152\/8791\/files\/MIDLANDINDUSTRIES_944429_7550c425-0ce7-4c5d-93fb-dcd78f235530.jpg?v=1778884483"},{"product_id":"1-14-ips-brass-inline-check-valve-944433","title":"1-1\/4 in. IPS Brass Inline Check Valve","description":"\u003cp\u003eThe \u003cstrong\u003e1-1\/4 in. IPS Brass Inline Check Valve\u003c\/strong\u003e (#944433) is a spring-loaded brass inline check valve that allows flow in one direction and closes automatically to prevent backflow. Buna-N (NBR) seals suit water, oils, and many chemical services. Compact inline body installs in any orientation — vertical or horizontal — without special mounting.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBody Material\u003c\/td\u003e\n\u003ctd\u003eBrass body\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSpring Material\u003c\/td\u003e\n\u003ctd\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSeal \/ O-ring\u003c\/td\u003e\n\u003ctd\u003eBuna-N (NBR)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePressure Rating\u003c\/td\u003e\n\u003ctd\u003e150–500 PSI depending on model\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e−20°F to 250°F (−29°C to 121°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eAny orientation (vertical or horizontal)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e944433\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eBrass body \/ Stainless spring construction\u003c\/li\u003e\n  \u003cli\u003eSpring-loaded — closes automatically when flow stops or reverses\u003c\/li\u003e\n  \u003cli\u003eInstall in any orientation — vertical or horizontal\u003c\/li\u003e\n  \u003cli\u003eBuna-N (NBR) seals — compatible with water, oils, and most process fluids\u003c\/li\u003e\n  \u003cli\u003eCracking pressure factory-set for reliable sealing\u003c\/li\u003e\n  \u003cli\u003eCompact inline form factor — minimal installation space required\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCommon Applications\u003c\/h2\u003e\n\u003cp\u003eUsed as backflow preventers in chemical metering pump systems, water treatment injection points, pump discharge lines, and process piping where reverse flow would contaminate upstream systems or damage equipment.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Resources\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003ca href=\"\/pages\/check-valve-types-explained\"\u003eCheck Valve Types: Swing, Spring, Wafer, Ball\u003c\/a\u003e — Understand the differences\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/pages\/how-to-choose-the-right-valve\"\u003eHow to Choose the Right Valve\u003c\/a\u003e — Application selection guide\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/collections\/brass-check-valves\"\u003eShop Brass Check Valves\u003c\/a\u003e — Full brass check valve range\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- apex-guide-links --\u003e\n\u003cdiv style=\"margin-top:24px;padding:16px 20px;border:1px solid #ddd;border-radius:6px;background:#fafafa;\"\u003e\n\u003ch3 style=\"margin:0 0 10px;font-size:1.05rem;\"\u003eExpert Guides for This Product\u003c\/h3\u003e\n\u003cul style=\"margin:0;padding-left:20px;\"\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-installation-direction-orientation\"\u003eCheck Valve Orientation \u0026amp; Installation\u003c\/a\u003e — flow direction and mounting rules\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-sizing-guide\"\u003eCheck Valve Sizing Guide\u003c\/a\u003e — why line size isn't valve size\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-slamming-water-hammer\"\u003eSlamming \u0026amp; Water Hammer\u003c\/a\u003e — causes and fixes\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-leaking-diagnosis\"\u003eCheck Valve Leaking?\u003c\/a\u003e — diagnose and fix it\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-chattering-noise\"\u003eCheck Valve Chattering\u003c\/a\u003e — the sizing problem nobody checks\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/buna-vs-viton-check-valve-seats\"\u003eBuna vs. Viton Seats\u003c\/a\u003e — which elastomer fits your media\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- \/apex-guide-links --\u003e","brand":"Midland Industries","offers":[{"title":"Default Title","offer_id":48629262713047,"sku":"944433","price":64.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/4152\/8791\/files\/MIDLANDINDUSTRIES_944433_5e4bc142-c43f-4521-b671-632a1064f967.jpg?v=1778884485"},{"product_id":"1-14-brass-in-line-check-nbr-944406","title":"1-1\/4 in. Brass Inline Check Valve, Buna-N | 944406","description":"\u003cp\u003eThe 1-1\/4 in. brass inline check valve (part \u003cstrong\u003e944406\u003c\/strong\u003e) provides compact, spring-loaded backflow prevention with a Buna-N (NBR) soft seat for bubble-tight shutoff. Rated 400 psi WOG with a low 1\/2 psi cracking pressure, polyetherimide disc, and a patented disc guide that prevents side loading. Female NPT both ends. Made in Italy.\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer Part Number (MPN)\u003c\/td\u003e\n\u003ctd\u003e944406\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Size\u003c\/td\u003e\n\u003ctd\u003e1-1\/4 in.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eValve Type\u003c\/td\u003e\n\u003ctd\u003eInline check valve (spring-loaded poppet), brass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnd Connections\u003c\/td\u003e\n\u003ctd\u003eFemale NPT × Female NPT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePressure Rating\u003c\/td\u003e\n\u003ctd\u003e400 psi WOG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e+10°F to 210°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCracking Pressure\u003c\/td\u003e\n\u003ctd\u003e1\/2 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeat \/ Seal\u003c\/td\u003e\n\u003ctd\u003eBuna-N (NBR) — water, oils, general purpose\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisc\u003c\/td\u003e\n\u003ctd\u003ePolyetherimide — corrosion and abrasion resistant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch2\u003eDimensions\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBore Diameter\u003c\/td\u003e\n\u003ctd\u003e0.68\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.13 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch2\u003eMaterials of Construction\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody \u0026amp; End Connection\u003c\/td\u003e\n\u003ctd\u003eBrass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisc\u003c\/td\u003e\n\u003ctd\u003ePolyetherimide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeat\u003c\/td\u003e\n\u003ctd\u003eNBR (Buna-N)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpring\u003c\/td\u003e\n\u003ctd\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch2\u003ePerformance \u0026amp; Testing\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eLow 1\/2 psi cracking pressure — opens with minimal upstream pressure\u003c\/li\u003e\n\u003cli\u003eSpring-loaded for fast seating; perfect seating at both high and low pressure\u003c\/li\u003e\n\u003cli\u003ePatented disc guide prevents side loading — stable, chatter-resistant operation\u003c\/li\u003e\n\u003cli\u003eCompact, high-capacity design with a head-loss-minimizing flow profile\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot lead-free\u003c\/strong\u003e — for potable water supply lines, choose a lead-free certified valve (see Lead-Free Valves in our Valves menu)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"series-sizes\"\u003e\n\u003ch3\u003eOther Sizes in This Series\u003c\/h3\u003e\n\u003cp\u003eBrass Inline Check Valve, Buna-N, Female NPT (1\/4\"–4\"; 400 WOG through 2\", 175 WOG above). Jump to another size or add it straight to your cart:\u003c\/p\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePrice\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCart\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/14-brass-in-line-check-valve-944401\"\u003e1\/4 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944401\u003c\/td\u003e\n\u003ctd\u003e$17.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48629262287063:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/3-8-in-brass-inline-check-valve-buna-n-944402\"\u003e3\/8 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944402\u003c\/td\u003e\n\u003ctd\u003e$19.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48741841010903:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/12-brass-in-line-check-valve-nbr-944403\"\u003e1\/2 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944403\u003c\/td\u003e\n\u003ctd\u003e$20.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48629262483671:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/3-4-in-brass-inline-check-valve-buna-n-944404\"\u003e3\/4 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944404\u003c\/td\u003e\n\u003ctd\u003e$29.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48741780947159:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/1-in-brass-inline-check-valve-buna-n-944405\"\u003e1 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944405\u003c\/td\u003e\n\u003ctd\u003e$37.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48741841043671:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e1-1\/4 in. (this page)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e944406\u003c\/td\u003e\n\u003ctd\u003e$55.99\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/1-1-2-in-brass-inline-check-valve-buna-n-944407\"\u003e1-1\/2 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944407\u003c\/td\u003e\n\u003ctd\u003e$85.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48741841273047:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/2-in-brass-inline-check-valve-buna-n-944408\"\u003e2 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944408\u003c\/td\u003e\n\u003ctd\u003e$120.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48741850579159:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/2-1-2-in-brass-inline-check-valve-buna-n-944409\"\u003e2-1\/2 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944409\u003c\/td\u003e\n\u003ctd\u003e$283.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48741850644695:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/3-in-brass-inline-check-valve-buna-n-944410\"\u003e3 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944410\u003c\/td\u003e\n\u003ctd\u003e$355.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48741854314711:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/products\/4-in-brass-inline-check-valve-buna-n-944411\"\u003e4 in.\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e944411\u003c\/td\u003e\n\u003ctd\u003e$630.99\u003c\/td\u003e\n\u003ctd\u003e\u003ca style=\"color:#FE8C03\" href=\"\/cart\/48741854380247:1\"\u003eAdd to Cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2\u003eTypical Applications\u003c\/h2\u003e\u003cp\u003eBackflow prevention on water distribution, pump discharge, compressed air, and light oil lines; recirculation loops and gravity-fed systems where the 1\/2 psi cracking pressure matters; general-purpose industrial and irrigation service. Not for potable water supply (not lead-free).\u003c\/p\u003e\n\u003ch2\u003eCross-References \u0026amp; Interchange\u003c\/h2\u003e\u003cp\u003eReplacing another brand's 1-1\/4 in. brass inline check valve? Match nominal size, end connections, cracking pressure, and pressure rating for a direct fit — or send us your part number and we will confirm the interchange. Pumping fuels or hydrocarbons? The \u003ca style=\"color:#FE8C03\" href=\"\/products\/1-14-brass-in-line-check-944406v\"\u003e1-1\/4 in. Viton-seal version (944406V)\u003c\/a\u003e handles fuels and runs to 325°F. Corrosive chemicals? Step up to the \u003ca style=\"color:#FE8C03\" href=\"\/products\/1-1-4-in-316-stainless-steel-inline-check-valve-949406\"\u003e1-1\/4 in. 316 SS inline check valve (949406)\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eAvailability\u003c\/h2\u003e\u003cp\u003eIn stock — ships direct from the manufacturer, typically 1–3 business days.\u003c\/p\u003e\n\u003ch2\u003eTechnical Resources\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-types-explained\"\u003eCheck Valve Types Explained (Swing vs. Spring vs. Wafer)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca style=\"color:#FE8C03\" href=\"\/pages\/how-to-choose-the-right-valve\"\u003eHow to Choose the Right Valve\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca style=\"color:#FE8C03\" href=\"\/pages\/valve-pressure-temperature-ratings-chart\"\u003eValve Pressure \u0026amp; Temperature Ratings Chart\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- apex-guide-links --\u003e\n\u003cdiv style=\"margin-top:24px;padding:16px 20px;border:1px solid #ddd;border-radius:6px;background:#fafafa;\"\u003e\n\u003ch3 style=\"margin:0 0 10px;font-size:1.05rem;\"\u003eExpert Guides for This Product\u003c\/h3\u003e\n\u003cul style=\"margin:0;padding-left:20px;\"\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-installation-direction-orientation\"\u003eCheck Valve Orientation \u0026amp; Installation\u003c\/a\u003e — flow direction and mounting rules\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-sizing-guide\"\u003eCheck Valve Sizing Guide\u003c\/a\u003e — why line size isn't valve size\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-slamming-water-hammer\"\u003eSlamming \u0026amp; Water Hammer\u003c\/a\u003e — causes and fixes\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-leaking-diagnosis\"\u003eCheck Valve Leaking?\u003c\/a\u003e — diagnose and fix it\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-chattering-noise\"\u003eCheck Valve Chattering\u003c\/a\u003e — the sizing problem nobody checks\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/buna-vs-viton-check-valve-seats\"\u003eBuna vs. Viton Seats\u003c\/a\u003e — which elastomer fits your media\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- \/apex-guide-links --\u003e","brand":"Midland Industries","offers":[{"title":"Default Title","offer_id":48629262745815,"sku":"944406","price":56.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/4152\/8791\/files\/MIDLANDINDUSTRIES_944406_a1aec017-686a-445a-bd85-f2d5ed42670b.jpg?v=1778884486"},{"product_id":"single-check-valve-38-fptx38-mpt304ss-34846","title":"Single Check Valve, 3\/8 in. Female NPT x 3\/8 in. Male NPT, 304 Stainless Steel","description":"\u003cp\u003eThe \u003cstrong\u003eSingle Check Valve, 3\/8 in. Female NPT x 3\/8 in. Male NPT, 304 Stainless Steel\u003c\/strong\u003e (#34846) is a 304 stainless steel single check valve with flare or NPT connections. Spring-loaded poppet design closes instantly on flow reversal. Stainless body and flare fittings suit refrigeration, chemical injection, and high-cleanliness process applications.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBody Material\u003c\/td\u003e\n\u003ctd\u003e304 Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSpring Material\u003c\/td\u003e\n\u003ctd\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCheck Type\u003c\/td\u003e\n\u003ctd\u003eSingle spring poppet\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eEnd Connections\u003c\/td\u003e\n\u003ctd\u003eFemale NPT \/ Male NPT\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e−20°F to 400°F (−29°C to 204°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e34846\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e304 Stainless Steel body — corrosion resistant across wide chemical and temperature range\u003c\/li\u003e\n  \u003cli\u003eSingle spring poppet design\u003c\/li\u003e\n  \u003cli\u003eSpring-loaded — closes automatically on flow reversal\u003c\/li\u003e\n  \u003cli\u003eStainless spring internals — compatible with aggressive media\u003c\/li\u003e\n  \u003cli\u003eCompact body for tight installation spaces\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCommon Applications\u003c\/h2\u003e\n\u003cp\u003eUsed in refrigeration line sets, chemical injection systems, and precision metering applications requiring stainless steel purity and flare-connection compatibility.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Resources\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003ca href=\"\/pages\/check-valve-types-explained\"\u003eCheck Valve Types: Swing, Spring, Wafer, Ball\u003c\/a\u003e — Compare check valve styles\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/pages\/ball-valve-materials-guide\"\u003eBrass vs. Stainless vs. PVC\u003c\/a\u003e — When to choose stainless\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/collections\/stainless-steel-check-valves\"\u003eShop Stainless Check Valves\u003c\/a\u003e — Full SS check valve range\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- apex-guide-links --\u003e\n\u003cdiv style=\"margin-top:24px;padding:16px 20px;border:1px solid #ddd;border-radius:6px;background:#fafafa;\"\u003e\n\u003ch3 style=\"margin:0 0 10px;font-size:1.05rem;\"\u003eExpert Guides for This Product\u003c\/h3\u003e\n\u003cul style=\"margin:0;padding-left:20px;\"\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-installation-direction-orientation\"\u003eCheck Valve Orientation \u0026amp; Installation\u003c\/a\u003e — flow direction and mounting rules\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-sizing-guide\"\u003eCheck Valve Sizing Guide\u003c\/a\u003e — why line size isn't valve size\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-slamming-water-hammer\"\u003eSlamming \u0026amp; Water Hammer\u003c\/a\u003e — causes and fixes\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-leaking-diagnosis\"\u003eCheck Valve Leaking?\u003c\/a\u003e — diagnose and fix it\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-chattering-noise\"\u003eCheck Valve Chattering\u003c\/a\u003e — the sizing problem nobody checks\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/buna-vs-viton-check-valve-seats\"\u003eBuna vs. Viton Seats\u003c\/a\u003e — which elastomer fits your media\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- \/apex-guide-links --\u003e","brand":"Midland Industries","offers":[{"title":"Default Title","offer_id":48629262909655,"sku":"34846","price":3.99,"currency_code":"USD","in_stock":true}]},{"product_id":"dual-check-valve-14-fpt-14-mpt-304ss-34838","title":"Dual Check Valve, 1\/4 in. Female NPT x 1\/4 in. Male NPT, 304 Stainless Steel","description":"\u003cp\u003eThe \u003cstrong\u003eDual Check Valve, 1\/4 in. Female NPT x 1\/4 in. Male NPT, 304 Stainless Steel\u003c\/strong\u003e (#34838) is a dual 304 stainless steel check valve with flare connections, providing two-stage backflow protection in a single body. Used in refrigeration, chemical metering, and precision fluid control applications where double-block backflow prevention is required.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBody Material\u003c\/td\u003e\n\u003ctd\u003e304 Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSpring Material\u003c\/td\u003e\n\u003ctd\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCheck Type\u003c\/td\u003e\n\u003ctd\u003eDual poppet \/ spring\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eEnd Connections\u003c\/td\u003e\n\u003ctd\u003eFemale NPT \/ Male NPT\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e−20°F to 400°F (−29°C to 204°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e34838\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e304 Stainless Steel body — corrosion resistant across wide chemical and temperature range\u003c\/li\u003e\n  \u003cli\u003eDual poppet \/ spring design\u003c\/li\u003e\n  \u003cli\u003eSpring-loaded — closes automatically on flow reversal\u003c\/li\u003e\n  \u003cli\u003eStainless spring internals — compatible with aggressive media\u003c\/li\u003e\n  \u003cli\u003eCompact body for tight installation spaces\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCommon Applications\u003c\/h2\u003e\n\u003cp\u003eApplied in refrigeration line sets, chemical metering pump systems, and precision dosing equipment where two independent check stages prevent any reverse flow.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Resources\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003ca href=\"\/pages\/check-valve-types-explained\"\u003eCheck Valve Types: Swing, Spring, Wafer, Ball\u003c\/a\u003e — Compare check valve styles\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/pages\/ball-valve-materials-guide\"\u003eBrass vs. Stainless vs. PVC\u003c\/a\u003e — When to choose stainless\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/collections\/stainless-steel-check-valves\"\u003eShop Stainless Check Valves\u003c\/a\u003e — Full SS check valve range\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- apex-guide-links --\u003e\n\u003cdiv style=\"margin-top:24px;padding:16px 20px;border:1px solid #ddd;border-radius:6px;background:#fafafa;\"\u003e\n\u003ch3 style=\"margin:0 0 10px;font-size:1.05rem;\"\u003eExpert Guides for This Product\u003c\/h3\u003e\n\u003cul style=\"margin:0;padding-left:20px;\"\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-installation-direction-orientation\"\u003eCheck Valve Orientation \u0026amp; Installation\u003c\/a\u003e — flow direction and mounting rules\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-sizing-guide\"\u003eCheck Valve Sizing Guide\u003c\/a\u003e — why line size isn't valve size\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-slamming-water-hammer\"\u003eSlamming \u0026amp; Water Hammer\u003c\/a\u003e — causes and fixes\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-leaking-diagnosis\"\u003eCheck Valve Leaking?\u003c\/a\u003e — diagnose and fix it\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-chattering-noise\"\u003eCheck Valve Chattering\u003c\/a\u003e — the sizing problem nobody checks\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/buna-vs-viton-check-valve-seats\"\u003eBuna vs. Viton Seats\u003c\/a\u003e — which elastomer fits your media\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- \/apex-guide-links --\u003e","brand":"Midland Industries","offers":[{"title":"Default Title","offer_id":48629262942423,"sku":"34838","price":6.99,"currency_code":"USD","in_stock":true}]},{"product_id":"38-barrel-spring-check-valve-949442","title":"3\/8 in. Barrel Spring Check Valve","description":"\u003cp\u003eThe \u003cstrong\u003e3\/8 in. Barrel Spring Check Valve\u003c\/strong\u003e (#949442) is a compact barrel-style spring check valve with a 316 stainless steel body engineered for chemical metering pump outlet service. The straight-through barrel profile minimizes pressure drop while the stainless construction resists the corrosive chemicals, acids, and oxidizers common in water treatment and industrial dosing applications.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBody Material\u003c\/td\u003e\n\u003ctd\u003e304 Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSpring Material\u003c\/td\u003e\n\u003ctd\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCheck Type\u003c\/td\u003e\n\u003ctd\u003eBarrel spring (inline)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eEnd Connections\u003c\/td\u003e\n\u003ctd\u003eFemale NPT \/ Male NPT\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e−20°F to 400°F (−29°C to 204°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e949442\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e304 Stainless Steel body — corrosion resistant across wide chemical and temperature range\u003c\/li\u003e\n  \u003cli\u003eBarrel spring (inline) design\u003c\/li\u003e\n  \u003cli\u003eSpring-loaded — closes automatically on flow reversal\u003c\/li\u003e\n  \u003cli\u003eStainless spring internals — compatible with aggressive media\u003c\/li\u003e\n  \u003cli\u003eCompact body for tight installation spaces\u003c\/li\u003e\n  \u003cli\u003eFits directly onto chemical metering pump outlet ports\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCommon Applications\u003c\/h2\u003e\n\u003cp\u003eStandard at chemical metering pump discharge ports and injection check positions. The compact barrel form fits directly on pump outlet fittings with minimal piping. 316 SS body handles sodium hypochlorite (bleach), sulfuric acid, hydrochloric acid, and other aggressive water treatment chemicals that would attack brass or aluminum.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Resources\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003ca href=\"\/pages\/check-valve-types-explained\"\u003eCheck Valve Types: Swing, Spring, Wafer, Ball\u003c\/a\u003e — Compare check valve styles\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/pages\/ball-valve-materials-guide\"\u003eBrass vs. Stainless vs. PVC\u003c\/a\u003e — When to choose stainless\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/collections\/stainless-steel-check-valves\"\u003eShop Stainless Check Valves\u003c\/a\u003e — Full SS check valve range\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- apex-guide-links --\u003e\n\u003cdiv style=\"margin-top:24px;padding:16px 20px;border:1px solid #ddd;border-radius:6px;background:#fafafa;\"\u003e\n\u003ch3 style=\"margin:0 0 10px;font-size:1.05rem;\"\u003eExpert Guides for This Product\u003c\/h3\u003e\n\u003cul style=\"margin:0;padding-left:20px;\"\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-installation-direction-orientation\"\u003eCheck Valve Orientation \u0026amp; Installation\u003c\/a\u003e — flow direction and mounting rules\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-sizing-guide\"\u003eCheck Valve Sizing Guide\u003c\/a\u003e — why line size isn't valve size\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-slamming-water-hammer\"\u003eSlamming \u0026amp; Water Hammer\u003c\/a\u003e — causes and fixes\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-leaking-diagnosis\"\u003eCheck Valve Leaking?\u003c\/a\u003e — diagnose and fix it\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-chattering-noise\"\u003eCheck Valve Chattering\u003c\/a\u003e — the sizing problem nobody checks\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/buna-vs-viton-check-valve-seats\"\u003eBuna vs. Viton Seats\u003c\/a\u003e — which elastomer fits your media\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- \/apex-guide-links --\u003e","brand":"Midland Industries","offers":[{"title":"Default Title","offer_id":48629262975191,"sku":"949442","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/4152\/8791\/files\/MIDLANDINDUSTRIES_949442_ad5b0dd9-fc5a-4575-8ffe-2ac983736ad5.jpg?v=1778884489"},{"product_id":"14-ss-f-x-f-spring-check-valve-949451","title":"1\/4 in. Stainless Steel Female x Female Spring Check Valve","description":"\u003cp\u003eThe \u003cstrong\u003e1\/4 in. Stainless Steel Female x Female Spring Check Valve\u003c\/strong\u003e (#949451) is a compact barrel-style spring check valve with a 316 stainless steel body engineered for chemical metering pump outlet service. The straight-through barrel profile minimizes pressure drop while the stainless construction resists the corrosive chemicals, acids, and oxidizers common in water treatment and industrial dosing applications.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBody Material\u003c\/td\u003e\n\u003ctd\u003e304 Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSpring Material\u003c\/td\u003e\n\u003ctd\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCheck Type\u003c\/td\u003e\n\u003ctd\u003eBarrel spring (inline)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eEnd Connections\u003c\/td\u003e\n\u003ctd\u003eFemale NPT \/ Male NPT\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e−20°F to 400°F (−29°C to 204°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e949451\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e304 Stainless Steel body — corrosion resistant across wide chemical and temperature range\u003c\/li\u003e\n  \u003cli\u003eBarrel spring (inline) design\u003c\/li\u003e\n  \u003cli\u003eSpring-loaded — closes automatically on flow reversal\u003c\/li\u003e\n  \u003cli\u003eStainless spring internals — compatible with aggressive media\u003c\/li\u003e\n  \u003cli\u003eCompact body for tight installation spaces\u003c\/li\u003e\n  \u003cli\u003eFits directly onto chemical metering pump outlet ports\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCommon Applications\u003c\/h2\u003e\n\u003cp\u003eStandard at chemical metering pump discharge ports and injection check positions. The compact barrel form fits directly on pump outlet fittings with minimal piping. 316 SS body handles sodium hypochlorite (bleach), sulfuric acid, hydrochloric acid, and other aggressive water treatment chemicals that would attack brass or aluminum.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Resources\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003ca href=\"\/pages\/check-valve-types-explained\"\u003eCheck Valve Types: Swing, Spring, Wafer, Ball\u003c\/a\u003e — Compare check valve styles\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/pages\/ball-valve-materials-guide\"\u003eBrass vs. Stainless vs. PVC\u003c\/a\u003e — When to choose stainless\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/collections\/stainless-steel-check-valves\"\u003eShop Stainless Check Valves\u003c\/a\u003e — Full SS check valve range\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- apex-guide-links --\u003e\n\u003cdiv style=\"margin-top:24px;padding:16px 20px;border:1px solid #ddd;border-radius:6px;background:#fafafa;\"\u003e\n\u003ch3 style=\"margin:0 0 10px;font-size:1.05rem;\"\u003eExpert Guides for This Product\u003c\/h3\u003e\n\u003cul style=\"margin:0;padding-left:20px;\"\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-installation-direction-orientation\"\u003eCheck Valve Orientation \u0026amp; Installation\u003c\/a\u003e — flow direction and mounting rules\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-sizing-guide\"\u003eCheck Valve Sizing Guide\u003c\/a\u003e — why line size isn't valve size\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-slamming-water-hammer\"\u003eSlamming \u0026amp; Water Hammer\u003c\/a\u003e — causes and fixes\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-leaking-diagnosis\"\u003eCheck Valve Leaking?\u003c\/a\u003e — diagnose and fix it\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-chattering-noise\"\u003eCheck Valve Chattering\u003c\/a\u003e — the sizing problem nobody checks\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/buna-vs-viton-check-valve-seats\"\u003eBuna vs. Viton Seats\u003c\/a\u003e — which elastomer fits your media\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- \/apex-guide-links --\u003e","brand":"Midland Industries","offers":[{"title":"Default Title","offer_id":48629263007959,"sku":"949451","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/4152\/8791\/files\/MIDLANDINDUSTRIES_949451_31ebb280-3235-47a5-b396-ca51c5113c30.jpg?v=1778884490"},{"product_id":"12-barrel-spring-check-valve-949443","title":"1\/2 in. Barrel Spring Check Valve","description":"\u003cp\u003eThe \u003cstrong\u003e1\/2 in. Barrel Spring Check Valve\u003c\/strong\u003e (#949443) is a compact barrel-style spring check valve with a 316 stainless steel body engineered for chemical metering pump outlet service. The straight-through barrel profile minimizes pressure drop while the stainless construction resists the corrosive chemicals, acids, and oxidizers common in water treatment and industrial dosing applications.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBody Material\u003c\/td\u003e\n\u003ctd\u003e304 Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSpring Material\u003c\/td\u003e\n\u003ctd\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCheck Type\u003c\/td\u003e\n\u003ctd\u003eBarrel spring (inline)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eEnd Connections\u003c\/td\u003e\n\u003ctd\u003eFemale NPT \/ Male NPT\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e−20°F to 400°F (−29°C to 204°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e949443\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e304 Stainless Steel body — corrosion resistant across wide chemical and temperature range\u003c\/li\u003e\n  \u003cli\u003eBarrel spring (inline) design\u003c\/li\u003e\n  \u003cli\u003eSpring-loaded — closes automatically on flow reversal\u003c\/li\u003e\n  \u003cli\u003eStainless spring internals — compatible with aggressive media\u003c\/li\u003e\n  \u003cli\u003eCompact body for tight installation spaces\u003c\/li\u003e\n  \u003cli\u003eFits directly onto chemical metering pump outlet ports\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCommon Applications\u003c\/h2\u003e\n\u003cp\u003eStandard at chemical metering pump discharge ports and injection check positions. The compact barrel form fits directly on pump outlet fittings with minimal piping. 316 SS body handles sodium hypochlorite (bleach), sulfuric acid, hydrochloric acid, and other aggressive water treatment chemicals that would attack brass or aluminum.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Resources\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003ca href=\"\/pages\/check-valve-types-explained\"\u003eCheck Valve Types: Swing, Spring, Wafer, Ball\u003c\/a\u003e — Compare check valve styles\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/pages\/ball-valve-materials-guide\"\u003eBrass vs. Stainless vs. PVC\u003c\/a\u003e — When to choose stainless\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/collections\/stainless-steel-check-valves\"\u003eShop Stainless Check Valves\u003c\/a\u003e — Full SS check valve range\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- apex-guide-links --\u003e\n\u003cdiv style=\"margin-top:24px;padding:16px 20px;border:1px solid #ddd;border-radius:6px;background:#fafafa;\"\u003e\n\u003ch3 style=\"margin:0 0 10px;font-size:1.05rem;\"\u003eExpert Guides for This Product\u003c\/h3\u003e\n\u003cul style=\"margin:0;padding-left:20px;\"\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-installation-direction-orientation\"\u003eCheck Valve Orientation \u0026amp; Installation\u003c\/a\u003e — flow direction and mounting rules\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-sizing-guide\"\u003eCheck Valve Sizing Guide\u003c\/a\u003e — why line size isn't valve size\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-slamming-water-hammer\"\u003eSlamming \u0026amp; Water Hammer\u003c\/a\u003e — causes and fixes\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-leaking-diagnosis\"\u003eCheck Valve Leaking?\u003c\/a\u003e — diagnose and fix it\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-chattering-noise\"\u003eCheck Valve Chattering\u003c\/a\u003e — the sizing problem nobody checks\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/buna-vs-viton-check-valve-seats\"\u003eBuna vs. Viton Seats\u003c\/a\u003e — which elastomer fits your media\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- \/apex-guide-links --\u003e","brand":"Midland Industries","offers":[{"title":"Default Title","offer_id":48629263040727,"sku":"949443","price":44.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/4152\/8791\/files\/MIDLANDINDUSTRIES_949443_a35e500c-7b5b-462e-bca9-38d97bba7ff9.jpg?v=1778884491"},{"product_id":"12-ss-mxf-spring-check-valve-949473","title":"1\/2 in. Stainless Steel Male x Female Spring Check Valve","description":"\u003cp\u003eThe \u003cstrong\u003e1\/2 in. Stainless Steel Male x Female Spring Check Valve\u003c\/strong\u003e (#949473) is a compact barrel-style spring check valve with a 316 stainless steel body engineered for chemical metering pump outlet service. The straight-through barrel profile minimizes pressure drop while the stainless construction resists the corrosive chemicals, acids, and oxidizers common in water treatment and industrial dosing applications.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBody Material\u003c\/td\u003e\n\u003ctd\u003e304 Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSpring Material\u003c\/td\u003e\n\u003ctd\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCheck Type\u003c\/td\u003e\n\u003ctd\u003eBarrel spring (inline)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eEnd Connections\u003c\/td\u003e\n\u003ctd\u003eFemale NPT \/ Male NPT\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e−20°F to 400°F (−29°C to 204°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e949473\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e304 Stainless Steel body — corrosion resistant across wide chemical and temperature range\u003c\/li\u003e\n  \u003cli\u003eBarrel spring (inline) design\u003c\/li\u003e\n  \u003cli\u003eSpring-loaded — closes automatically on flow reversal\u003c\/li\u003e\n  \u003cli\u003eStainless spring internals — compatible with aggressive media\u003c\/li\u003e\n  \u003cli\u003eCompact body for tight installation spaces\u003c\/li\u003e\n  \u003cli\u003eFits directly onto chemical metering pump outlet ports\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCommon Applications\u003c\/h2\u003e\n\u003cp\u003eStandard at chemical metering pump discharge ports and injection check positions. The compact barrel form fits directly on pump outlet fittings with minimal piping. 316 SS body handles sodium hypochlorite (bleach), sulfuric acid, hydrochloric acid, and other aggressive water treatment chemicals that would attack brass or aluminum.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Resources\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003ca href=\"\/pages\/check-valve-types-explained\"\u003eCheck Valve Types: Swing, Spring, Wafer, Ball\u003c\/a\u003e — Compare check valve styles\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/pages\/ball-valve-materials-guide\"\u003eBrass vs. Stainless vs. PVC\u003c\/a\u003e — When to choose stainless\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/collections\/stainless-steel-check-valves\"\u003eShop Stainless Check Valves\u003c\/a\u003e — Full SS check valve range\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- apex-guide-links --\u003e\n\u003cdiv style=\"margin-top:24px;padding:16px 20px;border:1px solid #ddd;border-radius:6px;background:#fafafa;\"\u003e\n\u003ch3 style=\"margin:0 0 10px;font-size:1.05rem;\"\u003eExpert Guides for This Product\u003c\/h3\u003e\n\u003cul style=\"margin:0;padding-left:20px;\"\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-installation-direction-orientation\"\u003eCheck Valve Orientation \u0026amp; Installation\u003c\/a\u003e — flow direction and mounting rules\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-sizing-guide\"\u003eCheck Valve Sizing Guide\u003c\/a\u003e — why line size isn't valve size\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-slamming-water-hammer\"\u003eSlamming \u0026amp; Water Hammer\u003c\/a\u003e — causes and fixes\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-leaking-diagnosis\"\u003eCheck Valve Leaking?\u003c\/a\u003e — diagnose and fix it\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-chattering-noise\"\u003eCheck Valve Chattering\u003c\/a\u003e — the sizing problem nobody checks\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/buna-vs-viton-check-valve-seats\"\u003eBuna vs. Viton Seats\u003c\/a\u003e — which elastomer fits your media\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- \/apex-guide-links --\u003e","brand":"Midland Industries","offers":[{"title":"Default Title","offer_id":48629263073495,"sku":"949473","price":44.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/4152\/8791\/files\/MIDLANDINDUSTRIES_949473_cdf3c60a-b0e0-403a-9e4a-96c52919ff4e.jpg?v=1778884492"},{"product_id":"12-ss-in-line-check-valve-949430","title":"1\/2 in. Stainless Steel Inline Check Valve","description":"\u003cp\u003eThe \u003cstrong\u003e1\/2 in. Stainless Steel Inline Check Valve\u003c\/strong\u003e (#949430) is a compact barrel-style spring check valve with a 316 stainless steel body engineered for chemical metering pump outlet service. The straight-through barrel profile minimizes pressure drop while the stainless construction resists the corrosive chemicals, acids, and oxidizers common in water treatment and industrial dosing applications.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBody Material\u003c\/td\u003e\n\u003ctd\u003e304 Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSpring Material\u003c\/td\u003e\n\u003ctd\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCheck Type\u003c\/td\u003e\n\u003ctd\u003eBarrel spring (inline)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eEnd Connections\u003c\/td\u003e\n\u003ctd\u003eFemale NPT \/ Male NPT\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e−20°F to 400°F (−29°C to 204°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e949430\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e304 Stainless Steel body — corrosion resistant across wide chemical and temperature range\u003c\/li\u003e\n  \u003cli\u003eBarrel spring (inline) design\u003c\/li\u003e\n  \u003cli\u003eSpring-loaded — closes automatically on flow reversal\u003c\/li\u003e\n  \u003cli\u003eStainless spring internals — compatible with aggressive media\u003c\/li\u003e\n  \u003cli\u003eCompact body for tight installation spaces\u003c\/li\u003e\n  \u003cli\u003eFits directly onto chemical metering pump outlet ports\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCommon Applications\u003c\/h2\u003e\n\u003cp\u003eStandard at chemical metering pump discharge ports and injection check positions. The compact barrel form fits directly on pump outlet fittings with minimal piping. 316 SS body handles sodium hypochlorite (bleach), sulfuric acid, hydrochloric acid, and other aggressive water treatment chemicals that would attack brass or aluminum.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Resources\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003ca href=\"\/pages\/check-valve-types-explained\"\u003eCheck Valve Types: Swing, Spring, Wafer, Ball\u003c\/a\u003e — Compare check valve styles\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/pages\/ball-valve-materials-guide\"\u003eBrass vs. Stainless vs. PVC\u003c\/a\u003e — When to choose stainless\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/collections\/stainless-steel-check-valves\"\u003eShop Stainless Check Valves\u003c\/a\u003e — Full SS check valve range\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCross-References\u003c\/h2\u003e\u003cp\u003eCVS50, RL01-108SA\u003c\/p\u003e\n\u003c!-- apex-guide-links --\u003e\n\u003cdiv style=\"margin-top:24px;padding:16px 20px;border:1px solid #ddd;border-radius:6px;background:#fafafa;\"\u003e\n\u003ch3 style=\"margin:0 0 10px;font-size:1.05rem;\"\u003eExpert Guides for This Product\u003c\/h3\u003e\n\u003cul style=\"margin:0;padding-left:20px;\"\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-installation-direction-orientation\"\u003eCheck Valve Orientation \u0026amp; Installation\u003c\/a\u003e — flow direction and mounting rules\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-sizing-guide\"\u003eCheck Valve Sizing Guide\u003c\/a\u003e — why line size isn't valve size\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-slamming-water-hammer\"\u003eSlamming \u0026amp; Water Hammer\u003c\/a\u003e — causes and fixes\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-leaking-diagnosis\"\u003eCheck Valve Leaking?\u003c\/a\u003e — diagnose and fix it\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-chattering-noise\"\u003eCheck Valve Chattering\u003c\/a\u003e — the sizing problem nobody checks\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/buna-vs-viton-check-valve-seats\"\u003eBuna vs. Viton Seats\u003c\/a\u003e — which elastomer fits your media\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- \/apex-guide-links --\u003e","brand":"Midland Industries","offers":[{"title":"Default Title","offer_id":48629263106263,"sku":"949430","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/4152\/8791\/files\/MIDLANDINDUSTRIES_949430_9707adee-ec91-4c73-85cd-317a2b4f84f9.jpg?v=1778884493"},{"product_id":"34-316-ss-swing-check-valve-949354","title":"3\/4 in. 316 Stainless Steel Swing Check Valve","description":"\u003cp\u003eThe \u003cstrong\u003e3\/4 in. 316 Stainless Steel Swing Check Valve\u003c\/strong\u003e (#949354) is a 316 stainless steel swing check valve that uses a hinged disc rather than a spring to allow forward flow and seal against backflow. Swing checks offer the lowest pressure drop of any check valve style, making them ideal for gravity-flow and low-differential-pressure systems.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBody Material\u003c\/td\u003e\n\u003ctd\u003e316 Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSpring Material\u003c\/td\u003e\n\u003ctd\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCheck Type\u003c\/td\u003e\n\u003ctd\u003eSwing disc\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eEnd Connections\u003c\/td\u003e\n\u003ctd\u003eFemale NPT \/ Male NPT\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e−20°F to 400°F (−29°C to 204°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e949354\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e316 Stainless Steel body — corrosion resistant across wide chemical and temperature range\u003c\/li\u003e\n  \u003cli\u003eSwing disc design\u003c\/li\u003e\n  \u003cli\u003eSpring-loaded — closes automatically on flow reversal\u003c\/li\u003e\n  \u003cli\u003eStainless spring internals — compatible with aggressive media\u003c\/li\u003e\n  \u003cli\u003eCompact body for tight installation spaces\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCommon Applications\u003c\/h2\u003e\n\u003cp\u003eSpecified for pump discharge lines, water treatment return headers, and low-pressure gravity-flow piping where minimal pressure drop is critical. 316 SS construction suits seawater, brine, and corrosive chemical services.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Resources\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003ca href=\"\/pages\/check-valve-types-explained\"\u003eCheck Valve Types: Swing, Spring, Wafer, Ball\u003c\/a\u003e — Compare check valve styles\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/pages\/ball-valve-materials-guide\"\u003eBrass vs. Stainless vs. PVC\u003c\/a\u003e — When to choose stainless\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/collections\/stainless-steel-check-valves\"\u003eShop Stainless Check Valves\u003c\/a\u003e — Full SS check valve range\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCross-References\u003c\/h2\u003e\u003cp\u003e60SSTH04, 909 1, SC602I\u003c\/p\u003e\n\u003c!-- apex-guide-links --\u003e\n\u003cdiv style=\"margin-top:24px;padding:16px 20px;border:1px solid #ddd;border-radius:6px;background:#fafafa;\"\u003e\n\u003ch3 style=\"margin:0 0 10px;font-size:1.05rem;\"\u003eExpert Guides for This Product\u003c\/h3\u003e\n\u003cul style=\"margin:0;padding-left:20px;\"\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-installation-direction-orientation\"\u003eCheck Valve Orientation \u0026amp; Installation\u003c\/a\u003e — flow direction and mounting rules\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-sizing-guide\"\u003eCheck Valve Sizing Guide\u003c\/a\u003e — why line size isn't valve size\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-slamming-water-hammer\"\u003eSlamming \u0026amp; Water Hammer\u003c\/a\u003e — causes and fixes\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-leaking-diagnosis\"\u003eCheck Valve Leaking?\u003c\/a\u003e — diagnose and fix it\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-chattering-noise\"\u003eCheck Valve Chattering\u003c\/a\u003e — the sizing problem nobody checks\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/buna-vs-viton-check-valve-seats\"\u003eBuna vs. Viton Seats\u003c\/a\u003e — which elastomer fits your media\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- \/apex-guide-links --\u003e","brand":"Midland Industries","offers":[{"title":"Default Title","offer_id":48629263139031,"sku":"949354","price":59.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/4152\/8791\/files\/MIDLANDINDUSTRIES_949354_823d67b7-f61f-4a6d-9d51-c85ff9446bc7.jpg?v=1778884494"},{"product_id":"34-ss-y-spring-check-valve-949484","title":"3\/4 in. Stainless Steel Y Spring Check Valve","description":"\u003cp\u003eThe \u003cstrong\u003e3\/4 in. Stainless Steel Y Spring Check Valve\u003c\/strong\u003e (#949484) is a compact barrel-style spring check valve with a 316 stainless steel body engineered for chemical metering pump outlet service. The straight-through barrel profile minimizes pressure drop while the stainless construction resists the corrosive chemicals, acids, and oxidizers common in water treatment and industrial dosing applications.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBody Material\u003c\/td\u003e\n\u003ctd\u003e304 Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSpring Material\u003c\/td\u003e\n\u003ctd\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCheck Type\u003c\/td\u003e\n\u003ctd\u003eBarrel spring (inline)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eEnd Connections\u003c\/td\u003e\n\u003ctd\u003eFemale NPT \/ Male NPT\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e−20°F to 400°F (−29°C to 204°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e949484\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e304 Stainless Steel body — corrosion resistant across wide chemical and temperature range\u003c\/li\u003e\n  \u003cli\u003eBarrel spring (inline) design\u003c\/li\u003e\n  \u003cli\u003eSpring-loaded — closes automatically on flow reversal\u003c\/li\u003e\n  \u003cli\u003eStainless spring internals — compatible with aggressive media\u003c\/li\u003e\n  \u003cli\u003eCompact body for tight installation spaces\u003c\/li\u003e\n  \u003cli\u003eFits directly onto chemical metering pump outlet ports\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCommon Applications\u003c\/h2\u003e\n\u003cp\u003eStandard at chemical metering pump discharge ports and injection check positions. The compact barrel form fits directly on pump outlet fittings with minimal piping. 316 SS body handles sodium hypochlorite (bleach), sulfuric acid, hydrochloric acid, and other aggressive water treatment chemicals that would attack brass or aluminum.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Resources\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003ca href=\"\/pages\/check-valve-types-explained\"\u003eCheck Valve Types: Swing, Spring, Wafer, Ball\u003c\/a\u003e — Compare check valve styles\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/pages\/ball-valve-materials-guide\"\u003eBrass vs. Stainless vs. PVC\u003c\/a\u003e — When to choose stainless\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/collections\/stainless-steel-check-valves\"\u003eShop Stainless Check Valves\u003c\/a\u003e — Full SS check valve range\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- apex-guide-links --\u003e\n\u003cdiv style=\"margin-top:24px;padding:16px 20px;border:1px solid #ddd;border-radius:6px;background:#fafafa;\"\u003e\n\u003ch3 style=\"margin:0 0 10px;font-size:1.05rem;\"\u003eExpert Guides for This Product\u003c\/h3\u003e\n\u003cul style=\"margin:0;padding-left:20px;\"\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-installation-direction-orientation\"\u003eCheck Valve Orientation \u0026amp; Installation\u003c\/a\u003e — flow direction and mounting rules\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-sizing-guide\"\u003eCheck Valve Sizing Guide\u003c\/a\u003e — why line size isn't valve size\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-slamming-water-hammer\"\u003eSlamming \u0026amp; Water Hammer\u003c\/a\u003e — causes and fixes\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-leaking-diagnosis\"\u003eCheck Valve Leaking?\u003c\/a\u003e — diagnose and fix it\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-chattering-noise\"\u003eCheck Valve Chattering\u003c\/a\u003e — the sizing problem nobody checks\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/buna-vs-viton-check-valve-seats\"\u003eBuna vs. Viton Seats\u003c\/a\u003e — which elastomer fits your media\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- \/apex-guide-links --\u003e","brand":"Midland Industries","offers":[{"title":"Default Title","offer_id":48629263171799,"sku":"949484","price":79.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/4152\/8791\/files\/MIDLANDINDUSTRIES_949484_0a929413-e5de-4354-aabd-d99b821e7aa1.jpg?v=1778884495"},{"product_id":"1-12-barrel-spring-check-valve-949447","title":"1-1\/2 in. Barrel Spring Check Valve","description":"\u003cp\u003eThe \u003cstrong\u003e1-1\/2 in. Barrel Spring Check Valve\u003c\/strong\u003e (#949447) is a compact barrel-style spring check valve with a 316 stainless steel body engineered for chemical metering pump outlet service. The straight-through barrel profile minimizes pressure drop while the stainless construction resists the corrosive chemicals, acids, and oxidizers common in water treatment and industrial dosing applications.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBody Material\u003c\/td\u003e\n\u003ctd\u003e304 Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSpring Material\u003c\/td\u003e\n\u003ctd\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCheck Type\u003c\/td\u003e\n\u003ctd\u003eBarrel spring (inline)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eEnd Connections\u003c\/td\u003e\n\u003ctd\u003eFemale NPT \/ Male NPT\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e−20°F to 400°F (−29°C to 204°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e949447\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e304 Stainless Steel body — corrosion resistant across wide chemical and temperature range\u003c\/li\u003e\n  \u003cli\u003eBarrel spring (inline) design\u003c\/li\u003e\n  \u003cli\u003eSpring-loaded — closes automatically on flow reversal\u003c\/li\u003e\n  \u003cli\u003eStainless spring internals — compatible with aggressive media\u003c\/li\u003e\n  \u003cli\u003eCompact body for tight installation spaces\u003c\/li\u003e\n  \u003cli\u003eFits directly onto chemical metering pump outlet ports\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCommon Applications\u003c\/h2\u003e\n\u003cp\u003eStandard at chemical metering pump discharge ports and injection check positions. The compact barrel form fits directly on pump outlet fittings with minimal piping. 316 SS body handles sodium hypochlorite (bleach), sulfuric acid, hydrochloric acid, and other aggressive water treatment chemicals that would attack brass or aluminum.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Resources\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003ca href=\"\/pages\/check-valve-types-explained\"\u003eCheck Valve Types: Swing, Spring, Wafer, Ball\u003c\/a\u003e — Compare check valve styles\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/pages\/ball-valve-materials-guide\"\u003eBrass vs. Stainless vs. PVC\u003c\/a\u003e — When to choose stainless\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/collections\/stainless-steel-check-valves\"\u003eShop Stainless Check Valves\u003c\/a\u003e — Full SS check valve range\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- apex-guide-links --\u003e\n\u003cdiv style=\"margin-top:24px;padding:16px 20px;border:1px solid #ddd;border-radius:6px;background:#fafafa;\"\u003e\n\u003ch3 style=\"margin:0 0 10px;font-size:1.05rem;\"\u003eExpert Guides for This Product\u003c\/h3\u003e\n\u003cul style=\"margin:0;padding-left:20px;\"\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-installation-direction-orientation\"\u003eCheck Valve Orientation \u0026amp; Installation\u003c\/a\u003e — flow direction and mounting rules\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-sizing-guide\"\u003eCheck Valve Sizing Guide\u003c\/a\u003e — why line size isn't valve size\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-slamming-water-hammer\"\u003eSlamming \u0026amp; Water Hammer\u003c\/a\u003e — causes and fixes\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-leaking-diagnosis\"\u003eCheck Valve Leaking?\u003c\/a\u003e — diagnose and fix it\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/check-valve-chattering-noise\"\u003eCheck Valve Chattering\u003c\/a\u003e — the sizing problem nobody checks\u003c\/li\u003e\n\u003cli\u003e\n\u003ca style=\"color:#FE8C03\" href=\"\/pages\/buna-vs-viton-check-valve-seats\"\u003eBuna vs. Viton Seats\u003c\/a\u003e — which elastomer fits your media\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- \/apex-guide-links --\u003e","brand":"Midland Industries","offers":[{"title":"Default Title","offer_id":48629263204567,"sku":"949447","price":129.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/4152\/8791\/files\/MIDLANDINDUSTRIES_949447_c32b6053-2f69-4507-b490-05ba85fb0710.jpg?v=1778884496"},{"product_id":"14mip-x-14barb-cp-ball-vavle-wcheck-944051","title":"1\/4 in. Male NPT x 1\/4 in. Barb Chrome-Plated Ball Valve with Check","description":"\u003cp\u003eThe \u003cstrong\u003e1\/4 in. Male NPT x 1\/4 in. Barb Chrome-Plated Ball Valve with Check\u003c\/strong\u003e (#944051) is a forged brass mini ball valve offering higher pressure capability and greater structural integrity than cast-body alternatives. Compact size and quarter-turn operation make it ideal for instrument isolation, chemical metering skids, and tight-space shutoff applications in industrial piping systems.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBody Material\u003c\/td\u003e\n\u003ctd\u003eForged Brass\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSeat \/ Seal Material\u003c\/td\u003e\n\u003ctd\u003ePTFE (Teflon) \/ Buna-N\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eEnd Connections\u003c\/td\u003e\n\u003ctd\u003eSee product title\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePort Type\u003c\/td\u003e\n\u003ctd\u003eFull port (full bore)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHandle\u003c\/td\u003e\n\u003ctd\u003eStandard lever handle\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePressure Rating\u003c\/td\u003e\n\u003ctd\u003e400 WOG\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e−20°F to 366°F (−29°C to 186°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperation\u003c\/td\u003e\n\u003ctd\u003eQuarter-turn (90°)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e944051\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eCompact mini body — fits tight spaces where full-size valves cannot\u003c\/li\u003e\n  \u003cli\u003eQuarter-turn operation — instant open\/close in 90°\u003c\/li\u003e\n  \u003cli\u003eForged Brass construction for durability\u003c\/li\u003e\n  \u003cli\u003ePTFE (Teflon) \/ Buna-N seals\u003c\/li\u003e\n  \u003cli\u003eBlow-out-proof stem for safety compliance\u003c\/li\u003e\n  \u003cli\u003eHose barb port for direct tubing connection — no fittings needed\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCommon Applications\u003c\/h2\u003e\n\u003cp\u003eWidely specified for instrument isolation valves, gauge shutoffs, chemical metering pump systems, compressed air branch shutoffs, and any space-constrained shutoff position in industrial or commercial piping systems.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Resources\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003ca href=\"\/pages\/ball-valve-materials-guide\"\u003eBrass vs. Stainless vs. PVC Ball Valves\u003c\/a\u003e — When to choose each material\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/pages\/how-to-choose-the-right-valve\"\u003eHow to Choose the Right Valve\u003c\/a\u003e — Application-based selection guide\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/collections\/mini-ball-valves\"\u003eShop All Mini Ball Valves\u003c\/a\u003e — Full mini valve size range\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Midland Industries","offers":[{"title":"Default Title","offer_id":48629263237335,"sku":"944051","price":4.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/4152\/8791\/files\/MIDLANDINDUSTRIES_944051_24e8aa37-1336-4deb-b3d8-333c9e5a3f80.jpg?v=1778884497"}],"url":"https:\/\/apexflowsolutions.com\/collections\/metering-pump-check-valves.oembed","provider":"Apex Flow Solutions","version":"1.0","type":"link"}