Quote:
Originally Posted by thevillages2013
Just trying to understand how that gas will escape from a solid pvc pipe
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The pipe may be solid PVC but it has slip joints which are supposed to be glued. However, I had a small wet spot in my ceiling in a former house which turned out to be condensed water from the bath fan vent which was not glued in an almost horizontal run to the roof vent. This house had several vents from plumbing connected to a single roof vent. I believe that it is worthwhile to check the vents since the roofers have to remove old "boots/collars" around the roof vent and install new. If the joints were not glued the vent may have been lifted up and a caused an opening/ vent leak.