Tech Topics: Check Valves for Submersible Installations

Check valves permit water flow in one direction only, and are required on all submersible pump installations. Their purpose is to prevent the water in the column above the pump and in the pressure tank from draining back into the well when the pump shuts off. Some submersible pumps have built-in check valves, and are suitable for operation without an external check valve, provided the pump setting is not too deep. Consult your pump manufacturer concerning proper application and installation.