I can hear a dripping sound from under my sink only in the mornings after the sink hasn’t been used all night. The dripping sound disappears after 15 minutes. There are water marks on the floor below.
I have had a couple of plumbers come out and none could find anything wrong with it. They suggest just ignoring it because they would have to open up all the walls in the kitchen otherwise.
My theory has been that there are minor cracks/holes in the pipe that dry out overnight and maybe seal themselves after the water has been running. Is this plausible at all???
You need to put a pressure gauge on your hose bib over night with a needle that tells you the highest pressure in your system. Some times when everyone goes to bed at night in your area, there is less demand on the city water and your pressure will go up, and causes a leak. In La Jolla I have seen 215 PSI.
