I have an Itasca 36F that has 2 bath rooms. Love the floor plan but I have a problem. The small mid coach bath room has a terrible odor as does the compartment below where the black tank pump is locat...
Where is your water heater located? I started smelling the rotten egg smell after the coach had sat for a while. I usually drain out the water heater when it's going to be a few weeks between trips, but didn't that last time prior to smelling it. Drained it, flushed it and there was no more smell. Just a thought.