jnharley wrote:
Do you have a vent fan on in the bathroom? Those things can really suck up the odor when you flush. The air admittance valves in our unit went out right after we bought the RV, We need to replace the one for the galley tank again. They just do not seem to last long. They are cheap though.
This. Also try using
The geo method to manage your tanks. I used to get really bad odors on my tt until I switched to this. Also, make sure you always keep some water in the black tank to avoid the dreaded stone mountain from forming.