1/4 in. Brass Spring Check Valve, 500 PSI, Female NPT x Female NPT, Viton Seal
1/4 in. Brass Spring Check Valve, 500 PSI, Female NPT x Female NPT, Viton Seal
Backordered at the manufacturer — available to order; shipping date is not currently confirmed.
Flat-rate shipping, nationwide- Orders under $100: $9.95
- Orders $100 and up: $14.95
Some oversized or bulky items ship at a different flat rate — the exact rate is shown in your cart and at checkout.
Volume order or crossing a competitor part number? Request a quote — usually answered the same business day.
The 1/4 in. Female x Female 500 PSI Check Valve with Viton (#46561V) is a 500 PSI rated brass check valve with Viton (FKM) seals, for backflow prevention in oil, gas and diesel-fuel service. Female NPT × Female NPT connections install directly inline with standard pipe threads.
Technical Specifications
| Specification | Value |
|---|---|
| Body Material | Brass body |
| Seal / O-ring | Viton (FKM) |
| Pressure Rating | 500 PSI |
| Temperature Rating | 180°F |
| Part Number | 46561V |
Key Features
- Brass body
- Spring-loaded — closes automatically when flow stops or reverses
- Viton (FKM) seal — for oil, gas and diesel fuel
- 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 oil, gas and diesel-fuel lines.
Technical Resources
- Check Valve Types: Swing, Spring, Wafer, Ball — Understand the differences
- Shop Brass Check Valves — Full brass check valve range
Other Sizes in This Series
The 500 PSI Brass Spring Check Valve (Female NPT x Female NPT, Viton) is available in the following sizes:
| Size | Part # |
|---|---|
| 1/8 in. | 46560V |
| 1/4 in. (this page) | 46561V |
| 3/4 in. | 46564V |
Prefer standard Buna-N seals for water/air service? See the Buna-N version (46561).
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