jesse3638
Hooked
Yeah that sounds like fun and a lot of holes to patch...haha. Although the plumber who repaired my downstairs water leak noticed a ton of silicone around the guest bathtub faucet and shower valve assembly. In the garage below it does appear that possibly some moisture had gotten to the drywall on the ceiling because there is a section I can see where the tape looks to be missing. More detective work is in order^^ This - you could have a cross connection somewhere that's allowing the hot water into a cold line like Mark's suggesting. Only way to find that is to trace all of your hot lines to see if someone connected it to a cold line somewhere.
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