backwater valve, backflow valve
A type of check valve in a drainage pipe; reversal of flow causes the valve to close, thereby cutting off […]
General
check valve
General
ball-check valve
valve in a piping system; when the fluid flows in one direction, pressure against a movable ball allows fluid to
Glossary
flap valve
In plumbing, a check valve in the form of a hinged disk which permits flow in one direction only.