The system consists of the electric motor and pump, 15 gallon tank, pressure gauge, and on/off pressure switch. The tank is set at 38 psi and the pressure switch at 40/50 psi. The
pressure gauge shows at least 50 psi. I just had the pump repaired and I reinstalled it to the system. There are no leaks from the pump or pvc piping and connections. The pump cycles w/o any problems when it has a full water pumping load, but if I use the water very sparingly (e.g. filling a small pail), the pump cycles on and will not shut off when I turn off the water. If I then open the water faucet full to get full pressure, and then turn the water off, it will shut itself off. Could I have a pressure tank problem or whatever. All thoughts greatly appreciated. Thanks
Commented on Apr 28, 2012
Thanks for the quick replies. I'm starting to think that the problem may be in the tank.
When I took the tank off the pump (for motor/pump repair) the water in the tank shot out like a fire hose. In the past this had never happened and that included a couple of different tanks. I've tried adjusting the pressure switch downward in pressure, so that may also be my problem. I'll readjust the pressure upward. Let's see what happens.