The Homewerks Schedule 40 PVC Check Valve is used to prevent backward flow of liquid in residential, commercial, agricultural and light industrial applications. PVC Schedule 40 pipe is used for drainage and lower pressure water flow applications. Homewerks valve is constructed from long-lasting PVC material with a durable stainless steel spring with an o-ring seal. Bring quality and efficiency to your project with this schedule 40 PVC check valve from Homewerks.