Check Valves

Check Valves for Reliable Backflow Prevention

A check valve allows flow in one direction only, using a disc, ball, or spring-loaded plate to snap shut the instant flow reverses. At 24hr Supply, we stock the check valve styles plumbers reach for most - Everflow brass swing checks, Matco-Norca cast iron silent wafer checks, and Apollo ball cone checks - to protect pumps, prevent water hammer, and keep contaminated water from flowing backward into clean lines.

Swing check valves use a hinged disc and need extra straight pipe run to seat properly, making them a solid choice for larger horizontal lines. Wafer-style silent check valves are compact and spring-assisted, closing quietly before flow reverses, which makes them better suited to tight mechanical rooms and vertical installations where noise and space both matter.

Match the valve type, size, and pressure rating to your system, and confirm local code requirements where backflow prevention is mandated. For code-required backflow protection on potable water lines, pair a check valve with the right backflow preventer for full system protection.