By passed Black Tank Flush back flow preventer

Nope , no reply from a Master plumber. Still that thing that`s prone to leak is not going to stay in my camper. I did see another post of one that caused a flood on another forum board a while back. I`ll just use one of vac breaks from Lowes on the convenience center outlet with my shark bite on the down side of the system and call it a day. Like the other fella I fill my water tank through the water softener and disconnect anyway, refill as needed.