Hi guys. OP here. First, I want to thank everyone that responded. Went to an RV place here in Yuma and we decided to start with the vent itself. As the days went by, the odor has definitely gotten less? Rather than pay the RV place, I decided to let more days go by and see/smell if the problem goes completely away. Why spend money exploring if, hopefully the odor goes away. I let the black tank go to about 3/4 and I have a feeling the entrance to the vent was cleared some from the additional sloshing around. Of course I don't know for sure. Again, thank you for the many responses. Louie
