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TheMohns's avatar
TheMohns
Explorer
Sep 27, 2016

Dirty water in toilet bowl after sitting

I parked my trailer in storage last week and just went to check on it today. The black tank was about 1/3 full when I parked it and I left the toilet bowl filled a few inches up with clean water. When I checked it today, the bowl was filled with dirty sewer water. How could it get from the black tank up into the bowl?

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