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Old 06-16-2020, 08:53 PM   #1
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Dometic toilet leak

I have a new trailer with a Dometic 300 toilet. I went on my first long trip last week and ended up with an ever increasing odor from the toilet.
After my trip I ended up pulling the toilet. What I found was that there was an internal leak that was allowing liquid to get into the internal chambers of the toilet. The only way to clean the crud out was to disassemble the 3 main sections of the unit. I am not 100% sure but it appears that the fluid was bypassing the gasket just above the ball valve gasket. Yes, on this toilet there is a gasket above the ball valve gasket that should keep the liquid in the bowl from entering the internal parts.
I put it all back together and filled the bowl with water for an overnight test and so far, nothing bypassed the seal.
Anyone else have this happen? You would know if it did because of the smell!
What really puzzles me is that I went to the Dometic website and found a diagram of the toilet parts but the gasket that failed is not shown. I would like to get a part number to order more of these gaskets but no idea how.
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Old 06-16-2020, 10:20 PM   #2
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Call them....
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Old 06-17-2020, 12:47 AM   #3
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Call who?
Dometic, Forest River, or the dealer that sold it to me?

I sent a message to the dealer but have had no reply yet.
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Old 06-17-2020, 07:26 AM   #4
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them=Dometic. call them.
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Old 06-17-2020, 12:26 PM   #5
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This is a known problem with the Dometic Model 300 toilet. The outer upper and lower body of the toilet separate slightly - bad glue job. Had this happen to me. There IS NO FIX short of replacement. Dometic has a 2-year warranty IIRC, so call them ASAP if not sooner. Mine was out of warranty, but I found a good price on a Model 310 and installed it with no issues.

Good luck!

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Old 06-19-2020, 07:16 AM   #6
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I bought the RV 3 months ago so no problem with warranty running out.
I found a web form on the Dometic site so I sent my issue that way. I don't have time to spend listening to elevator music on my phone! There was an immediate reply:
"Valued Dometic Customer, we are experiencing higher than normal email volume which is causing a delay in our response. We appreciate your patience as we work through this time."
This should be fixable from what I saw. The 2 pieces go together as a slip fit and there is a gasket that fits between them. The design flaw is that there is nothing holding the gasket in place so it is free to move around.
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