We had our new pool's plumbing installed 2 weeks ago and they put 23lbs of pressure in the line to pressure test. There has been a ton of activity back there during those 2 weeks (tile, coping, stonework, deck forming, rebar, sand) and I noticed that the gauge has dropped to 20lbs. There has been about an overall 10-15 degree drop in temperature during that time. The decking is getting poured in 2 days and want to be sure that there aren't any leaks before hand.
Should I be concerned with a 3lb drop in pressure over 2 weeks or is that normal?
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