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, Male NPT x Female NPT, NBR Seal
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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, for backflow prevention in water, air and inert-gas service. Male NPT x Female NPT connections install directly inline with standard pipe threads.
Technical Specifications
| Specification | Value |
|---|---|
| Body Material | Brass |
| Seal / O-ring | Buna-N (NBR) |
| Pressure Rating | 500 PSI |
| Temperature Rating | 180°F |
| Part Number | 46575 |
Key Features
- Brass body
- Spring-loaded — closes automatically when flow stops or reverses
- Buna-N (NBR) seal — for water, air and inert gas
- Cracking pressure factory-set for reliable sealing
- Compact inline form factor — minimal installation space required
Common Applications
Backflow prevention where a 500 PSI rating is needed on water, air and inert-gas lines. For potable-water service, ask us to confirm lead-free status before you order.
Technical Resources
Cross-References
Need a Viton (FKM) seal? 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