Smell only when you flush — The vent pipe is blocked or the black tank treatment isn’t working properly. A blocked vent creates negative pressure that pulls gases back through the toilet. Fix: clear the vent pipe from the roof, or switch to a more effective enzyme-based treatment.
How to Eliminate RV Toilet Odor (Causes & Fixes)
A comprehensive approach to understanding biological processes, common failures, and premium solutions for a pristine RV environment.