I have a 2013 thetford aqua-magic style II that was in our motor home when we bought it new. It has never held water in the bowl. I had the RV back to CW for some other warranty work and I mentioned this to them and when I picked it up they told me it just needed cleaned (It had never been used yet) but it did have water in when I picked it up. however the next time I flushed it was back to leaking down. I just recently bought a new seal and installed it and it still leaks. I can snap the pedal a couple of times and let it snap back it will hold. Is there a spring on the ball valve that might be weak?

There is debris in the seal where the blade is. Thetrford sells a bent screw driver to clean it.I mad one out of a peice of wire. Wire is about the size of an old wire coat hanger. Start with a peice of wire about 15-18 inches long, bend one end at a 90 degree angle about one inch long. Make a handle on the other end so you can hang on to it so it doesn't drop into the tank accidentally.Insert the short one inch into the groove where slide goes in. Gently move it circularlly around to clean out the groove. It only takes a small peice of debris to let the water leak out. It could be even a peice of tissue.Thetford Bent screwdriver

Actually, I prefer a Popsicle stick to a coat hanger to clean the seal.Less likely to tear the seal.

All good advice and ideas from the above posters. I use a bush like this from Walmart (less than $2.00). It's soft enough that it won't harm the seal.I put a bigger string on it and loop that around my wrist so that I don't drop it down into the tank..Works great.

there is nothing to scape or brush out,it is brand new

I sprayed a liberal dose of silicone spray on all moving parts and pivot points and it cured mine snaps back nice now and holds water.

Toilet Won"t Hold Water | Good Sam Community

Dutch_12078
Explorer II
Sep 25, 2018
2oldman wrote:
Leaking toilets almost always need replacing to stop leaking. Other remedies are temporary at best.

Is it "temporary" when cleaning mineral and other deposits off the seal stops the leak down issue for 2-3 years? Or do you suggest replacing the entire toilet with a new one that may also start leaking down in 2-3 years in hard water conditions? Do you own stock in Thetford/Norcold? ;)
ljhl
Explorer
Sep 25, 2018
When my toilet doesn’t hold water in the bowl I pour a cup or two of white vinegar into the bowl. The vinegar will seep past the rubber seal at the same place the water seeps out. The vinegar may melt away the hard water deposits that are causing the leak. I’ve had great luck with vinegar in my Sealand toilet. I keep a gallon jug of vinegar on the floor behind my toilet and put some vinegar in the bowl from time to time as preventative maintenance.
fischer
Explorer
Sep 27, 2018
Mine was doing the same . I read somewhere that the rubber was catching. The fix was to apply Vaseline. On the rubber. Worked fine now.
2oldman
Explorer II
Dec 09, 2018
ljhl wrote:
When my toilet doesn’t hold water in the bowl I pour a cup or two of white vinegar into the bowl..
Thanks! That did the trick, for now. I'll try using vinegar as maintenance too.

With a gloved hand I reached underneath the rubber gasket and it felt rough. Not sure it's supposed to be that way.
stevenal
Nomad II
Dec 10, 2018
A little silicone grease on a cotton swab works well for flush valves as well as drain valves.

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