Foretravel Owners' Forum For owners and Fans of Foretravel Motorcoaches September 12, 2025 ...

I believe this vent behind the toilet is the culprit for the blank tank smell we occasionally get. How does one remove it? It looks like it may be a male threaded bit that screws into the female end of the pipe but it won't budge. Twisting the ribbed ring on the pipe also yields no results. I don't want to really crank on this thing until I know for sure.

Thanks in advance

I got it off with a pair of channel locks. Thanks guys

I got it off with a pair of channel locks. Thanks guys

I replaced all of my air admittance valves (AAV) three years ago.  The obvious bad one was next to the kitchen sink, it was black in the before picture below.  It was wet and distorted.  I replaced all, as the seals get hard, and are likely to leak air out, or seal, not allowing air in from the interior.

If the water level in the kitchen sink goes higher than the AAV, this is a no no, according to the instructions with the new valve.  To me, that makes sense.  When I replaced it I mounted it higher, as you can see in the photo below.  I had to use a rubber plumbing connector, to get it up higher and as close as possible to the Corian counter top.  This mounted it out and away from the cabinet wall molding.
Before picture:
Shared album - John Lewis - Google Photos
After picture:
Shared album - John Lewis - Google Photos