[HayZee518]

the purpose of the well pump is to pump water into a storage tank. the storage tank may or may not have an air bladder to restrict the pump oscillations and provide a back pressure to the system. when the system pressure decreases below a set point, the pump turns on and attempts to refill the tank and re-pressurize the system. if, however the demand on the system is constant, as in taking a shower, the pump will continue to operate to replace the water that is drawn off. the system pressure may drop from the normal 45-50 psi to something smaller like 25-30 lbs. the flow rate will decrease. once the shower is done with the pump will keep on running trying to "catch up" to what was lost. eventually it will and cause the system to re-pressurize and shut off. people with city water don't have to worry about this because system pressures are about 80-85 psi and constant.