For a permanent, leak-tight seal, insert unthreaded pipe into the socket ends on these valves and bond with primer and cement. To withstand aggressive and corrosive solutions in chemical-processing applications, they have a fluoroelastomer seal and a plastic body. All gradually open and close with multiple turns of the wheel handle to prevent system damage from suddenly starting and stopping flow. Valves have a nonrising stem that stays in the same position whether the valve is open or closed.

Use repair kits to replace worn-out seals.

Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.

A lightweight alternative to metal valves, these plastic valves have NPT connections for use with threaded pipe. All meet NSF/ANSI 61 for use in drinking water systems. Also known as gate valves, they gradually open and close with multiple turns of the wheel handle to prevent system damage from suddenly starting and stopping flow. Since the handle sits on a nonrising stem, it stays at the same height whether these valves are open or closed. This helps them fit in underground lines and other low-clearance spots. When seals wear out, replace them using repair kits (sold separately).

CPVC valves resist heat up to 200° F, making them a better choice for hot water than PVC valves.

Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.