I have a Thetford. The vacuum breaker on the back of the toilet has leaked twice. I replaced it the first time. Second time I plugged the top vent hole where it was leaking out. No more leaks.
Honestly I don't know why they have a vacuum breaker on a toilet bowl???
Probably some code ...
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Daryl and Marianne,
2019 3130re 20th Anniversary Edition
2016 F350 Lariat
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