Larry Grenon
New Member
Installed a new 3/4 hp submersible pump in our well to replace old one. When the pressure drops to cut in 30psi, the relay switch clicks on and there is a 1-3 second delay before the pressure starts increasing, and a water hammer clunk sound at the pressure tank. There is a built in check valve on the pump in the well (some 150' down) and a check valve just before the pressure tank. Oddly, when I run a hose or the sprinkler system, there is no delay or hammer noise, it all works normal. It happens primarily after toilet flushing. The pressure switch seems to work perfectly (30-50) and the pressure tank is 28psi. Please help.