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Author:
BadPRV (VA)
Starting about 5 days ago, I have had a water leak through my dining room ceiling come at about 2 am every night and continue until about 6 am. The leak was sufficient to add about 4 or 5 inches of water into the bucket of a wet/dry vac each day. Above my dining room are a bathroom and a small washer/dryer closet. Starting almost immediately, we completely abandoned use of the bathroom and washer/dryer, and we turned the water off to the washer. However, the 2 am leaks continued. While waiting for my plumber appointment, I got a gauge and measured the pressure at my hose bib. This was very high and got higher during the night. For example, 85 psi daytime and 120 at some point during the night. It seems clear that the PRV was bad and it was replaced today.
Regarding the leak...the plumber revealed the pipes via the dining room ceiling and also checked the bathroom and closet themselves for signs of any problems. He also revealed the pipes behind the bathroom's shower faucets. He was unable to determine any source of leak. I assumed that the high water pressure was the culprit, but it seems that this would have required the water to leak through the joints of the sealed plastic pipes. The plumber did not think this was likely. Any thoughts about this? Thanks.
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Author:
steve (CA)
That's quite a bit of water, so it shouldn't be too hard to locate the source, and being you know the time frame of the leak, that's a bonus. Do you have an expansion tank on the water line? If yes, has it been checked to see if it's waterlogged? Even if it is, you shouldn't have that much water leaking out of a bad joint. Check the pressure when you see the leak occurring.
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Author:
BadPRV (VA)
Thank you. I do not have an expansion tank. But since the pressure reduction valve was replaced, there hasn't been any leak.
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Author:
srloren (CA)
Years ago while installing a copper system in the floor joists a small leak was detected in the ceiling below. I opened up the ceiling drywall and found a copper joint was not soldered. Apparently I missed that one but it held the pressure for a long period of time before it started leaking. If it is a potable water leak I would start looking at this. If it is a leak from a toilet wax ring, the fix is entirely different. Good luck.
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