my pressure switch keeps clicking on and off. my water pressure is good and the tank is a couple of years old. i had a plumber out to check it out and he said that i had a leak in my water line somewhere between my well and the tank. when we aren't using the water we turn off the pump so the pressure switch doesn't burn out. when we turn off the water you can hear the water drain out of the house. maybe someone has an idea what's going on?