1/8 in. Brass Spring Check Valve, 500 PSI, Male NPT x Female NPT, NBR Seal | 46575
1/8 in. Brass Spring Check Valve, 500 PSI, Male NPT x Female NPT, NBR Seal | 46575
✓ In stock at our distribution warehouses — typically ships within 1–2 business days.
Flat-rate shipping, nationwide- Orders under $100: $9.95
- $100 – $499.99: $14.95
- Orders $500+: quoted — real freight for your order, not a flat guess
Volume order or crossing a competitor part number? Request a quote — usually answered the same business day.
The 1/8 in. Male x Female 500 PSI Check Valve (#46575) is a 500 PSI rated brass check valve with Buna-N (NBR) seals, designed for high-pressure shutoff and backflow prevention in water, oil, and compatible process fluid service. Male NPT x Female NPT connections install directly inline with standard pipe threads.
Technical Specifications
| Specification | Value |
|---|---|
| Body Material | Brass |
| Spring Material | Stainless Steel |
| Seal / O-ring | Buna-N (NBR) |
| Pressure Rating | 500 PSI |
| Temperature Range | 180°F |
| Installation | Any orientation (vertical or horizontal) |
| Part Number | 46575 |
Key Features
- Brass body / Stainless spring construction
- Spring-loaded — closes automatically when flow stops or reverses
- Install in any orientation — vertical or horizontal
- Buna-N (NBR) seals — compatible with water, oils, and most process fluids
- Cracking pressure factory-set for reliable sealing
- Compact inline form factor — minimal installation space required
Common Applications
Specified for high-pressure water supply, hydraulic return lines, compressed air, and industrial process piping where standard 150 PSI check valves are insufficient. 500 PSI rating suits pumped systems, booster pumps, and pressure-boosted water lines.
Technical Resources
Cross-References
Pumping fuels, oils, or need a wider temperature range? See the Viton-seal version (46575V).
Expert Guides for This Product
- Check Valve Orientation & Installation — flow direction and mounting rules
- Check Valve Sizing Guide — why line size isn't valve size
- Slamming & Water Hammer — causes and fixes
- Check Valve Leaking? — diagnose and fix it
- Check Valve Chattering — the sizing problem nobody checks
- Buna vs. Viton Seats — which elastomer fits your media