Came home yesterday and found my well pump running and only holding 50psi. It wouldn't build up enough to shut off. So I turned it off and started looking for leaks. After not finding any I turned it back on and no pressure at all so I primed it and got it to build up to 20psi but as soon as I cut it off pressure would drop so I pulled the lines from the well and found one had a hole in it. So I replaced the pipe and foot valve and put it all back primed the pump and still only 20 to 25 psi but the pressure won't drop now when I turn it off it just won't build up enough pressure to cut off the pump. Anyone have any ideas what the problem may be? Any help would be great. Thx in advance.