Brass check valves from 1/8 in. to 4 in. in inline spring, swing, Y-pattern, tank, ball-check and anti-siphon styles, including Midland-designated lead-free brass models and one cast-bronze inline model. Ratings, seals and connections vary by product, so confirm the specification on each product page.
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All brass check valves
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1/8 in. Inline Check Valve, Midland 947140 -
1/8 in. Brass Spring Check Valve, 500 PSI, Female NPT x Female NPT, NBR Seal -
1/8 in. Brass Spring Check Valve, 500 PSI, Male NPT x Female NPT, NBR Seal -
1/8 in. Brass Spring Check Valve, 500 PSI, Female NPT x Female NPT, Viton Seal -
1/8 in. Brass Spring Check Valve, 500 PSI, Male NPT x Female NPT, Viton Seal -
1/8 in. Brass Check Valve, Female NPT x Female NPT -
1/4 in. Hose Barb x 1/4 in. Male NPT Brass Check Valve -
1/4 in. Brass Inline Check Valve, Buna-N -
1/4 in. Brass Spring Check Valve, 500 PSI, Female NPT x Female NPT, NBR Seal -
1/4 in. Brass Spring Check Valve, 500 PSI, Female NPT x Female NPT, Viton Seal -
1/4 in. Brass Check Valve, Female NPT x Female NPT -
1/4 in. Brass Check Valve, Male NPT x Female NPT -
1/4 in. Brass Check Valve, Male NPT x Male NPT -
3/8 in. Inline Check Valve -
1/2 in. Brass Inline Check Valve, Buna-N -
1/2 in. Brass Spring Check Valve, 500 PSI, Female NPT x Female NPT, NBR Seal -
3/4 in. Brass Spring Check Valve, 500 PSI, Female NPT x Female NPT, NBR Seal -
3/4 in. Brass Spring Check Valve, 500 PSI, Female NPT x Male NPT, NBR Seal -
3/4 in. Brass Spring Check Valve, 500 PSI, Female NPT x Female NPT, Viton Seal -
3/4 in. Brass Spring Check Valve, 500 PSI, Female NPT x Male NPT, Viton Seal -
1-1/4 in. IPS Brass Inline Check Valve -
1-1/4 in. Brass Inline Check Valve, Buna-N -
1/8 in. Brass Ball Check Valve, Compression -
1/4 in. Brass Pneumatic Check Valve, Female NPT x Female NPT
Inline Spring Check Valves
Midland's pages for the 944401–944411 inline series list female NPT ends and 400 psi WOG through 2 in. (175 psi WOG from 2-1/2 to 4 in.), with a Buna-N (NBR) seat or, on the V models, a Viton (FKM) seal. See the brass inline check valve series. Midland's product pages list 500 psi for the 46560–46575 series, with Buna-N or FKM (Viton) seals, 180 °F; ends are female x female, male x female or female x male by model.
Swing and Y-Pattern Check Valves
Brass swing checks use a hinged disc; Midland's pages for the standard brass swing models list female NPT ends and 200 psi WOG. Brass Y-pattern checks are offered with female NPT or sweat (C x C) ends, and Midland lists 200 psi WOG for the threaded Y-pattern models. Midland-designated lead-free swing and inline models are also grouped in lead-free check valves.
Tank, Ball-Check and Anti-Siphon Valves
Midland's pages list 450 psi and 400 °F for the 87020, 87021 and 87023 tank check valves, and 300 psi for the 18092, 18094 and 18096 compression ball-check valves. The 46520 (male NPT x male NPT) and 46530 (hose barb x male NPT) anti-siphon valves are one-way valves for hose and threaded connections; for chemical-feed or metering-pump use, ask us and we will confirm suitability with the manufacturer.
Choosing a Brass Check Valve
Seal choice is the main brass decision: Buna-N or Viton (FKM) is offered by part number, so match the seal listed on the product page. For lead-free status or certification documents, ask us for the exact part number. Where a pressure, seal or connection value is not shown, a spec sheet is available on request. Request selection help, or browse inline, swing and Y-pattern check valves across materials.