10/27/2023
I had the most challenging clean out job yesterday.
The owner had a 2009 Pace Arrow Class A RV.
Both of the toilets were plugged. Come to find out, the back toilet at the rear of the rig, (directly above the black tank) doesn't dump into the black tank, but runs along in a 2" hose to the front of the rig where it Ys together with the 1/2 bath toilet into a small 3gal tank, that is then diaphragm pumped in a 2" hose back to the rear of the rig into the black tank. The plug was a mix of gravel and sand that plugged the 2" line, the Y and filled the inside of the 3 gal tank with this gravel sand mix.
We were able to get the hoses apart, and unplugged so the toilets were empty and not smelling anymore , but the 3 gal tank and pump will have to be removed and cleaned out and hope the pump is not damaged.