drb1025
Guru
I haven't seen this issue discussed before. When I return to the boat after a couple of weeks and flush the toilet, a holding tank odor comes out at the same time it flushes. It only does this the first flush and it is fine until I leave it for a couple weeks. The vacuum holds and the water stays in the bowl while I am away. This is a new issue for me; It has not previously done this. I put a new (non-Sealand) vent filter on this fall. Could it be that causing it? Any ideas? Thanks