I guess I wasn't too clear as to the purpose of the pipe. It is for putting additional water into the black tank prior to dumping in order to get as much solid material out as possible, then adding about 5 gallons of water after dumping is complete. It is not for flushing the toilet.
K Charles wrote:
Every camper we ever had the water goes down when you flush the toilet. If you want more water you move the pedal, or lever, the other way.
My toilet operates like any other, but filling the tank via the pipe I installed is much faster. To use it, the water pump is turned off (saving onboard water), the toilet flush pedal is depressed and held down, the vinyl tubing is directed into the toilet drain opening, and the bibb turned on. I can sort of gauge the black tank level by the sound the water makes as the tank is filled. When I can see the water in the waste pipe, or it sounds like it is close, I shut off the bibb, go outside, open the tank drain valve, and turn on the black tank flush. The pipe makes a secondary fill and dump, if necessary, much faster as well.
Sorry for any confusion. I am happy to answer questions anyone may have.