Trouble with black tank sprayer... baffling

bob2j8 wrote:
I hooked up my black tank sprayer this weekend to flush, and absolutely no water was getting through to the tank. I've used this sprayer many times, but this weekend, nothing. I'm thinking it must be clogged or something. I even disconnected the vacuum breaker under the bathroom vanity and hooked it up directly to the outside hose bib, as well as hooking it up to my city water hose when I got home yesterday. Still nothing. its like the line has been completely blocked. I'm at a loss as to why this would happen. The trouble now is that my underbelly is enclosed and I have to remove a bunch of stuff just to be able to get to the sprayer. If anybody has any tips, please let me know.

Could it be the back flow preventer installed between the black flush hose connection and the tank sprayer has malfunctioned? Would seem the most likely candidate as the cause.........

EDIT: The "vacuum breaker" you speak of, is that the back flow preventer? How do you disconnect it? On our Jayco, that thing is connected to the Pex tubing with crimp connectors. If I was to remove it, I'd be staring at two tubing ends. Did you remove it from the tubing and "bridge" the gap somehow?