The toilet must be kept clean.
Rv black tank smell.
If there are no clogs or leaks but there still is a smell the toilet itself is dirty.
Follow the steps outline in this article how to clean your rv black tank to give your tank a good.
Always leave the black tank dump valve closed unless you are actively dumping.
Every so often do your gray tank too.
This is the preferred tank freshener of many rv owners and if your problem is a lack of tank deodorant this should do the trick.
Despite the fact that rv toilets are made of heavy plastic waste and dirt.
That said if the smell is really terrible this step will do little to disguise the stench and you ll need to try some other methods of smell removal.
Keeping your black water tank odor free.
If you flush and clean your black tank regularly you ll prevent tank waste buildup inside.
If the flapper breaks or becomes blocked so that it does not close all the way the odor from the black water tank enters the rv and makes it smell.