Quote:
Originally Posted by Marine007
Just so I'm clear because I'm new to the motor home life you are referring to the pipe with the cap on it with the elbow on the bottom as the drain pipe?
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Yes, the drain with the elbow on it. Usually the smells should travel up the vent pipe that goes out to the roof, but it is possible that if there is no water in the trap the odors are coming back up through the drain pipe as well.