I am losing air pressure at my water pump
I am losing water pressure in my house. I have a shallow well, and my pressure gauge on my pump is losing pressure. I replaced the foot valve, and my pump is still kicking on evey 12 minutes even with no water turned on. I drained the pressure tank and put 28lbs of air in it. 2 psi below my cut in pressure, filled it back up. I tapped my tank, it sounds like a dead thud sound up to about half way then the top half sounds hollow. I have a 1/2 hp mastercraft pump and about a 20 gallon goulds pressure tank. Any advice would greatly be appreciated. Thanks Rick