I have a '99 Pace Arrow 34N.
For some reason when we use the head and flush the TP plugs the downspout.
I have looked down the discusting thing' with a flashlight' trying to see the path but it appears there is a 90 degree elbow or a P trap, can't tell.
My other Pacer had a straight drop and relyed on the seal to keep the smell down.
It appears that the 50 gal. holding tanks were replaced at sometime or the other, I have no paperwork. All I know is they replaced the 50s with 25 gal tanks and built a 2x4 frame to hold them up.
Camping World quoted me the price of a new coach to correct the tanks, and they would not commit to why things plug up.
When we travel the first thing we load is the plunger.
Anyone have a problem like this??