U.S. Plastic Corporation Spring Check Valves 18342

1" PVC Spring Check valves are used to prevent back-flow and siphoning. The 2 lb. SS spring maintains a positive seal even when no back pressure is present. Suggest applications: pool/spa, irrigation and commercial water systems. A 2 psi minimum flow pressure is required to open valve. They have a pressure rating of 100 psi non-shock water at 73F. Flow direction indicator molded into body for accurate installation. 304 SS spring is corrosion resistant. Thermoplastic spring check valves shall be constructed from PVC Type 1, cell class 12454 material conforming to ASTM D-1784. Seals shall be EPDM. They come with either socket or threaded end connections.