davonelsonExplorerApr 02, 2017OdorBegan noticing bad smell from electrical control area (near floor, at door and behind toilet of our fifth wheel. Not typical electrical smell nor raw sewage smell but rather more like a dirty old hor...Show More
Old-BiscuitExplorer IIIApr 03, 2017Bad AAVs.....air admittance valves used to break negative pressure in drain lines allow grey tank odors INSIDE RVNasty, stinky waste tanks...black/grey....can only smell INSIDE RV if/when the vapor barriers fail----seals, gaskets, vents, 'P' trapsSmells OUTSIDE RV " Odor strong outside in battery and electrical compartment,,,"is the area one should be focused on first.