Black tank flush

[FunSteak]

I do this all the time. Dump, run flush hose, close valve and wait a minute or two, dump again, repeat as needed until the discharge runs clear. It's kind of amazing how much more stuff comes out.

Rule number 1 - NEVER, EVER WALK AWAY WHILE DOING THIS! I stand there staring at it until I'm finished, ignoring all else. So far, so good. (knock wood)

 

[TheBar]

Wait - it says that?

This season something I've tried is after the black tank is done draining I'll open up the gray tank with the black valve still open, and quite a bit of gray will backflow into the black tank. Enough that it seems to wash out a bit more than without.

Mark B.
Albuquerque, NM

I do the same and always fill the grey tank full before heading to the dump station. It flushes several gallons of grey into the black tank that way.

 

[JudyJB]

Regarding stupid signs, twice I was lucky enough to take a Transatlantic Crossing on the QE2, aka RMS Queen Elizabeth 2. However, even this classic ship had signs painted on the railings not to sit or stand on them.