Lead-free brass spring check valves from Matco-Norca and Wright Valves in all common sizes (1/2" through 2") with threaded and sweat connections. 200 psi CWP (Cold Working Pressure) rated, approved for potable water use nationwide.
Threaded ends on all models comply with ANSI B2.1. Sweat ends comply with ANSI B16.18
About Spring Loaded Check Valves
Spring check valve is a one-way valve with a spring-loaded stem & seal, located in-line with and at the center of the valve. While water flows in the "open direction", the pressure pushes the stem and the valve remains open. When flow ceases, the spring pushes the stem to its’ normally "closed" position, preventing gravity flow and backflow caused by backpressure. Spring check valves available at PexUniverse have a cracking pressure of about 0.5 and therefore produce very little pressure drop.
This product does not meet the new low-lead criteria defined in Safe Drinking Water Act
and cannot be used for potable water applications,
including for drinking and cooking. This product can be used for non-potable water
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