rockhillmanor wrote:
P-traps and the toilet bowl evaporate when sitting. More so in warm weather climates.
Fill bathroom sink, kitchen sink and shower with water. And fill toilet bowl up to level. The smell is usually from the bathroom sink because many RV bathroom sinks dump directly into the black tank.
But even the kitchen sink that dumps into the gray when the p-trap water evaporates the smell from a gray tank will smell the same as a black tank.
Fill them all up and keep them filled and You will not have any more smell.
X2 seen this fix many a odor problem