[77newell]

David: if you have an air-flush toilet I would start there first. I have no clue what an air-flush toilet is since on my 77 coach we are old-school, but I've seen them mentioned on this forum several times. If you find nothing there, then the advice you've been given is really good. BTW, the description of your problem and what preceded it was helpful to me in providing you my suggestion.

I had an air leak on my coach that would knock the pressure flat in less than 20 minutes and it didn't make a sound that I could hear, but that may be more about my hearing than anything else, eh?