Spooky. The one time I was under the trailer, I found a length of the drain pipe from the kitchen was cut too long, and they had left it unconnected. I pulled the piece, maybe 24 inches long, and cut it to length, and then the fermo couplers would work. Wonder if there is another such cut?
Christopher A. Young Learn more about Jesus
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Make certain the smell is 'sewer gas' and not water mold. I had a pipe drip leak inside the wall of my home, perhaps several years went by before the leak worsened enough to notice. And, WHEW! smelled EXACTLY like gray water, but was not. Just the mold from all that leakage smelled like it.