If you’re having problems with smelly sewer odors in the RV a tip is to install a special inexpensive fan on the roof top sewer/waste tank vent. The fan will draw odors and sewer gases out of the rigs waste tanks. Super easy to install.
Camco RV Cyclone Sewer Plumbing Vent uses the power of the wind to draw holding tank odors out of your RV. Even a gentle breeze works with the dynamically engineered shape of the cyclone to create a powerful vortex that pulls odors up and away. It attaches easily to any RV plumbing vent. Rotates 360 degrees to follow the wind.