Black tank leaking

[Jsexton2]

I have a 2017 Fleetwood Bounder - Notice an odor in the rear of the unit inside. Nothing is wet inside. I noticed outside on the side where the grey/black release valve is located - it has a small drip of sewage. It is dripping from under the chassis, I am unable to tell if it is coming from a connection, but it is not the release valve. Any comments would be helpful, why would the smell be coming inside the unit if there are no leaks inside?

 

[J&JD]

You might check the vent pipe that goes up through the roof. Sometimes animals build nests that block the vent causing odors to enter the inside.

 

[Scotttkd2]

Vent pipe connection to tank can also fail, causing both odors and potential leakage.