VIP 1/2" (15mm) / 3/4" (20mm) / 1" (25mm) / 1 1/4" (32mm) / 1 1/2" (40mm) / 2" (50mm) Brass Spring Check Valve

A check valve / non-return valve / one-way valve, is a valve that normally allows fluid to flow through it in only one direction. Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. The internal part design of the valve will prevent the fluid from flowing back.