Your tanks stink to high heaven. Gray or black, doesn’t matter. All wastewater RV tanks smell like an overflowing public latrine at a county fair on a hot summer day. Don’t take it personally; everyone else’s tank smells the same way.

Tank odors are caused by natural anaerobic bacteria. You can reduce the offending smells by properly cleaning your tank and adding holding tank chemicals or enzymes, but the smell can only be mitigated, not eliminated.

There’s a simple, $15 part that will get rid of most RV tank odors. But before we get to that, let’s get to the bottom of the problem. (Not literally, of course.)