I finally figured it out!
I think I finally figured out why I have been getting black tank oder. It seems to go away when I plug the hole that the flush water comes out of. Now, I have been told that the "newer" Thetford Aqu...
Forum Discussion
Sounds like a bad seal at the flange. I had one of those toilets with the overflow drain that leaked sewer gas it was awful! My present truck camper appears to have the same overflow but does not leak gas. If it does I will replace it no questions asked. But your if your present toilet has no overflow drain then it has to becoming from the flange or a leak in the vent system someplace. Does your flapper hold water. If it doesn't you will have the same problem.
