TheMohns
Sep 27, 2016Explorer
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?