If you ever have your toilet seal leak
Look to the paper you are disposing of. The secret is DO NOT PUT THE PAPER IN THE TOILET.Even the toated special paper.
I spent many distastful hours on my back removing the toilet and the body pan to get at the valves and cleaning small bits of paper from the beastie.
The secret is simple-------put paper in the garbage. If you like buy small plastic or paper bags for same. I have never had any troubles in this manner in the last 20 years.
Do not let the valves dry out . Keep a solution of mineral oil in toilet when not in use and some in the holding tank to lube the dump valve.
Your adherance to my post will bring me blessing from you in the future.
Dump valves...A most distastful chore.
Rae Burlington Ontario Canada