Definitions for "Check valve"
Keywords:  backflow, valve, flow, pipe, permit
A valve that permits flow in one direction only.
Installed where air is to flow in only one direction. Typically, from the pump to the tank. Valve closes when pump stops preventing air to flow from tank back to pump. This pre vents damage to pump valves and maintains air pressure in tank.
A mechanical device in a pipe that permits the flow of water or air in one direction only.