I am a newby and was thinking the other day(I've gotten in trouble doing this in the past) about a way to reverse flush the back water tank. This is probably ludicrous but I'll ask any way. Would it be possible to do the following: 1. drain the black tank in the standard fashion
2. put the outside cap back on the common drain(that drains both the gray and back water tanks)
3. open the full gray water tank valve and let this high pressure
water run backwards through the connecting pipe, into the back water pipe and into the black water tank.
4. Then before the pressure equalizes in the two tanks quickly shut off the gray water drain valve so no black tank water gets into gray tank. 5. Then once again drain the black water tank in the standard fashion.
I can hear the old timers now. "what an idiot!"
But none the less, is this doable? Thanks