1/4 in. Brass Anti-Siphon Check Valve, Male NPT x Male NPT
1/4 in. Brass Anti-Siphon Check Valve, Male NPT x Male NPT
Backordered at the manufacturer — available to order; shipping date is not currently confirmed.
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 1/4 in. Brass Anti-Siphon Check Valve (#46520) is a brass anti-siphon check valve that prevents backflow and back-siphonage on hose bib, spigot, and irrigation connections. Male NPT x Male NPT connections.
Technical Specifications
| Specification | Value |
|---|---|
| Manufacturer Part Number (MPN) | 46520 |
| Nominal Size | 1/4 in. |
| Valve Type | Anti-siphon check valve |
| End Connections | Male NPT x Male NPT |
| Body Material | Brass |
| Pressure Rating | Full manufacturer spec sheet available on request |
| Temperature Range | Full manufacturer spec sheet available on request |
Key Features
- Brass body construction
- Prevents backflow and back-siphonage at hose bib and spigot connections
- Male NPT x Male NPT end connections
- Compact, economical anti-siphon protection
Common Applications
Hose bibs, outdoor spigots, irrigation and lawn/garden connections, and other point-of-use locations requiring backflow / back-siphonage protection.
Technical Resources
Other Sizes in This Series
The Anti-Siphon Check Valve is available in the following configurations:
| Size | Part # |
|---|---|
| 1/4 in. (Brass) (this page) | 46520 |
| 1/4 in. (Aluminum) | 46520A |
| 5/16 in. (Brass, Hose Barb) | 46530 |
Need a lighter-weight body? See the Aluminum version (46520A).
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