Ron64
New Member
I just had a 1200 gal cistern installed with a submersible pump. I have a 20 gal pressure tank set at 30-50 in my basement which puts it about on the same level as the submersible. What I am seeing is that the pressure tank seems to pump up fine and shut off at about 48 psi on the gauge. If I check the gauge in a few hrs without using any water it will drop 2-4 psi. It continues to drop at a slower and slower rate until it reaches 30 psi in about 48 hrs. Note there is no check valve immediately behind the pressure tank. A friend suggests that because of the lack of head pressure in the cistern that it's nothing to be concerned about because it is most likely just pushing the water back into the cistern at an extremely slow rate and wouldn't be noticeable if under normal operation. I'm concerned that I may have a leak somewhere underground. I don't want to start digging if not needed, help?