New ta me TT. Has two water supply bibs. Figured out bottom is for supply water. Think tha top one is a black tank flush but cannot tell for sure. It goes to what looks like some type of regulator the...
If you connect your water hose to(what you think is) the black tank flush & turn it on--you should hear an high spend rotating humming sound--particularly if you are standing inside the 5'vr. Your black tank sewer hose should be hooked up--the black tank lever pulled out to let the water empty, if the tank is new and not used--otherwise go to a dump station or use some portable container. Congratulations on your new 29 5T. Lars