I dont know where to start but here goes. I had 2 contractors come in and check out my well because of excessive drawback. Both said there was nothing wrong with my footvalve or lines. they installed a check valve by my pump. That solved that problem. Now my pump turns on at 30 lbs and shutsoff at 48 lbs. my problem is it takes over 20 minutes before my pump shuts off and my pressure is good. I have a shallow well pump 1/3 hp and a single pipe operation. Maybe you can tell me what problem could be causing this? Thanks for any help you can give me.