I have a problem well for my barn. I was told that the people that put the line in dug down 4 ft but if they came apon a rock they just went over it. So the line has all kinds of humps. I loose prime about once a month, not sure why. Priming it is hell. My pump is also getting weak. I have an old submersible sump pump. I am going to install it on a switch to pump the water with a check valve to keep the line full. Does any one know if a sump set up like this could be run off a pressure switch? Basically like a submersible well pump.