aib
New Member
I have a bladder water tank and above-ground water pump, with 30/50 psi range. I open a tap to drain water but close it as soon as I hear the pump starting at about 30 psi. The pressure gauge on the pump goes close to 50 psi, but as soon as the pump shuts off the pressure drops rapidly to about 40 psi, and then slowly to about 38 psi. I left it overnight and it still showed 38 psi the next morning. Is this a check valve problem?