I live in rural Sunman Indiana and I just had a new .5 hp submersible well pump installed last year. The well is about 25 ft. deep. Water pressure is powerful at basement level, where the pressure tank is. If I open any basement faucet fully, water runs strong and then I lose water pressure as the pump shuts off. I have to lift the prime lever on the switch to restart the pump. Then it works fine again. It's as if once the pressure gets below 30psi the pump doesn't kick on fast enough to refill the pressure tank. Thus the shut off. Any ideas to troubleshoot and/or fix?