Deleted

Corkey05 wrote:
If it's a half bath, or a rear bath with the toilet over the engine, the contents need to be PUMPED to the holding tank.

This has been the method used for many years for toilets that are located away from the tanks. They are simple macerator pumps

We have one in the full rear bath, but doubtful that you can hear it from afar. The hallway 1/2 bath has a conventional RV toilet mounted over the black tank.