Originally Posted by eswan21
I have a 2007 George Town where is the over flow for the black tank? Will it come out of the toilet or will it come out of the vent on my roof first?
Well, fortunately I have never experienced an overflow, but I would have to go out on a limb here and say the principles of physics would have to apply. I see no way a toilet system that operates on gravity principles could force water, and other substances, into a tank, create pressure and force liquids or solids several feet up through a vent stack and out the vent on the roof.
Just like in a house, septic tank gets full, toilet overflows. Never saw waste coming out of a vent stack on a home roof. Someone else may have, but thankfully I have not.
My outdoor kitchen sink drains into my black tank and I still have to assume as it drains from gravity that even if the black tank filled, the toilet stayed closed and I kept running water into the sink that the sink would just overflow and nothing could be or would be forced up the vent pipe.
Maybe someone else will share an experience otherwise?