Originally Posted by fbconsults
When I try to introduce water into the black water holding tank through the black water flush system, it seems to be plugged somewhere. My first thought was the anti backflush valve where the external water hose attaches was stuck, but when I depressed the valve, water squirted out. I assume this was from the backpressure in the line. I wonder if threre is another anti backflush valve somewhere. It doesn't seem like just "stuff" where the water sprays into the tank could create this problem.
I hooked the air tank up to the black water flush inlet, turned on the air and Viola! I heard the clog come loose and the line was clear. Hooked up the water and I can now hear the sprayer working.
I hooked the air to water line adapter which is normally used to clear water from the lines when you winterize. Had about 75lbs of pressure in the tank, and turned it on. What a relief!
The adapter is available at Camping World or your camping accessories store for less than ten bucks if you don't have one. I should have thought of it before.
Thanks for all the suggestions and ideas, I appreciate it. All of the comments cause you to put on the old thinking cap.
Happy Trails (And clean black water tanks, LOL),