Remove air admittance valve
The air admittance in our Phaeton is located behind the washer/dryer. I have replaced it with a new, more expensive valve but I still get a slight unpleasant odot emitted from there. I know the trap f...
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On my old trailer, when I had an issue with one of those valves, I simply put a plastic bag over it and used a rubber band to secure it to the pipe. For me, it was a test to see if it really was the valve that was letting an odor in. If, after a day or two, you still smell something, then you have a different problem. If the smell goes away then you know the valve is bad. It is a cheap and simple test.
