We did a pressure test on each line and everything came back fine. We finished plumbing and set up a "tree". Ran enough water through the pipes to get 15PSI and it stayed steady for an hour. I went to bed sleeping peacefully.
I go back 12 hours later and my pressure dropped from 15PSI to 11PSI over a 12 hour period. I have a skimmer which looks wet. The plumber said it was the pipe running out the top of the skimmer that is the problem and not to worry, those screw off anyway after the build is complete so no leak is in the main plumbing.
Am I to worry? Suggestions?