hello, my pump and bladder had to be replaced. Old system water pressure was around 20, my problem is when I went to take a shower after 5 minutes in the water shuts off both cold and hot. Had repair man to turn down the pressure from 50 to 40. Still the same problem, today I flush the hot water tank and replaced both upper and lower elements- retry shower and in 8 minutes water just stops with no warning. I have called all in the phone book and asked a lot of people no one has heard of this. I never had a problem before 2 people before could shower back to back but after new pump and bladder I now have a problem. PS after water shuts off I wait 1 to 2 minutes and water will run for 10 minutes then shut down again. no air problems in any water lines. Thanks for your time.