If I run the shower, the water pressure will gradually drop on the gauge from 60 down to 40, then the switch contacts close and the needle flickers a bit then just drops off to zero for about 8-10 seconds then jumps back up to 40 and pressure builds back up and all is good, until the next time. I have properly checked the tank pressure 38-40 and top end 60. Of corse the actual water in the shower reflects how I described the gauge, is ok graduely drops then nothing, then back. I have a submersable well pump about 600 ft down with plenty of water. Please tell me I dont have to have it pulled up again. Its only 4 yrs old and I just had to have it pulled for a broken wire at the pump, from a chafe due to it torqueing when turning on. That was late December and 600 bucks. Any ideas???