(Leak!) Toilet plumbing connection to Black Waste tank...
This question is regarding a 2015 Thor Majestic 28a (but I assume most Class C RVs are hooked up similarly)... Summary: Leak at the toilet waste line connection to the top of the Black Waste Tank....
It's very difficult to empty the toilet every other day, especially during camping days. Is it possible to remove the cassette from the toilet and fitting a holding tank under the van? Maybe a Plumber help to install a submersible pump to empty it.