Filter by
For Use With
Mounting Position
Body Material
Valve Type
Fitting Connection
Minimum Opening Pressure
Connects To
Maximum Pressure @ Temperature
Thread Type
Shape
Gender
Seal Material
Maximum Temperature
Environment
Specifications Met
DFARS Specialty Metals
Export Control Classification Number (ECCN)
REACH
Certification
Food Industry Standard
Flow Coefficient (Cv)
Minimum Temperature
About Backflow-Prevention Valves
More
Easy-Maintenance Threaded Two-Stage
Backflow-Prevention Valves for Drinking Water
Dual-Check Valve
- For Use With: Drinking Water
- Seal Material: Buna-N Rubber
Integral shutoff valves isolate flow for inline maintenance, and a top-entry cover provides easy access to internal components. These valves meet NSF/ANSI 61 for use with drinking water. For maximum protection from system contamination, they consist of a primary check valve and a secondary check valve. If the first check fails to close when flow stops or reverses, the secondary check valve engages to prevent backflow. A strainer prevents debris from blocking the check valves.
| Pipe Size  | Max. Pressure | Min. Opening Pressure, psi | Temperature Range, °F | End-to-End Lg. | Features | Specifications Met | Each | |
Bronze Body—Dual-Check Valve | ||||||||
|---|---|---|---|---|---|---|---|---|
NPT Female × NPT Female | ||||||||
| 1/2 | 175 psi @ 180° F | 30 | 35° to 180° | 12 3/4" | Strainer | ASSE 1015, CSA Certified, NSF/ANSI 61, USC Foundation Approved | 0000000 | 0000000 |
| 3/4 | 175 psi @ 180° F | 30 | 35° to 180° | 14 5/16" | Strainer | ASSE 1015, CSA Certified, NSF/ANSI 61, USC Foundation Approved | 0000000 | 000000 |
| 1 | 175 psi @ 180° F | 30 | 35° to 180° | 17" | Strainer | ASSE 1015, CSA Certified, NSF/ANSI 61, USC Foundation Approved | 0000000 | 000000 |
| 1 1/2 | 175 psi @ 180° F | 30 | 35° to 180° | 21 5/8" | Strainer | ASSE 1015, CSA Certified, NSF/ANSI 61, USC Foundation Approved | 0000000 | 00000000 |
| 2 | 175 psi @ 180° F | 30 | 35° to 180° | 24 13/16" | Strainer | ASSE 1015, CSA Certified, NSF/ANSI 61, USC Foundation Approved | 0000000 | 00000000 |