I'm with Shane..... "Where's the P-trap?"
That sink drains into the grey water tank. Nothing smells worse than a grey water tanks after a day or two. If you have no P-trap, the grey water tank's fumes will come right up that drain pipe and stink you out of your camper.
The purpose of the "U" in the P-trap is to block fumes and insects from coming up the drain pipe. That "U" stays full of water and acts like a plug until water goes down the drain from the sink.
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TrailManor Elkmont
640W solar- 230AH LiFeP04 Battery
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