Don't know if it is any help, but I have found that if the toilet bowl dries up while our trailer is in storage. then when we come to use it again, it leaks. I have tried repeatedly to clean the seal and that hasn't helped. I dropped a few drops of food colouring into a bowl full of water to see whereabouts around the circumference it was escaping and that did show up the area of leakage very well. I then checked that area very closely for any defects that I could see or feel but found none.
In the end, we just kept using it (we only pee in it!) ad lo and behold after a couple of days it stopped leaking!
This has happened to us twice now with the same result - a couple o days use and it is fine again.
I wouldn't have thought that the seal could dry out but am forced to think that is what happens.
This Fall when I stored the trailer, I put an extra amount on plumbing antifreeze into the toilet bowl hoping that will prevent the problem.
We will likely pull the trailer out in mid-Feb to head south for a month or two.
Perhaps you have tred this but if not it might be worth a try - both times ours took three or four days use before t started sealing again after drying out in storage.
Brian.
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Brian & Connie Mitchell
2005 Classic 30'
Hensley Arrow / Centramatics
2008 GMC Sierra SLT 2500HD,4x4,Crew Cab, Diesel, Leer cap.
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