Our 1996 U320 has an air admittance valve for the grey water system in the cabinet behind the toilet. That cabinet has also been a great place to store many other things. One of those must have been the final straw and broke the short stack connecting the air admittance valve to the grey water vent pipes. The result was an odor that increased with the bathroom vent fan operation.
When I found the source of the problem I was more than a bit concerned about how a repair could be affected.
The first 2 photos show location; the next 2 give an idea for the sinking feeling I had, not sure how I would tackle the repair - no way to re-glue the broken plastic and no easy way to cut out and replace the coupling tee.
The following few photos show how I was able to make the repair (albeit perhaps temporary) once I found that the floorboard was designed to be removed (thanks Foretravel! ). The rubber pipe joiner was the life saver!
Grant, I don't think you need to concern yourself with that being a temporary repair. Those rubber couplers are very durable, and this one being inside, it will probably last as long as the rest of the coach. Besides, it would be relatively easy to just replace it with a new one. I used a larger version that was inside a stainless sleeve for my third valve installation inside the wet bay. As long as you had a fairly smooth surface for it to seal against, I'd say it's good to go!
Don
Agree with Don,
Sand off any raised areas (such as markings/lettering) so the rubber has a smooth surface. Then you should be good to go.
Thanks Don/Brett; I cut off the worst of it and cleaned it up before the final placement
Little play on words guys?
Fernco couplings are durable may last 10 years or more. The no-hub bands with the corrugated stainless steel are used in permanent situations but I'm not sure if you can get them smaller than 1 1/2"