Forum Discussion

crasster's avatar
crasster
Explorer II
Mar 28, 2014

Pump grey tank into black tank?

I was having a cold one with a camping buddy of mine and we were talking about the fun subject of black tanks.

It got us "thinking" what if one was to place a DC pump that pumped grey water into the black tank.

The purpose of this would be to help rinse the black tank out, and to allow this process to be done while boondocking.

I know typical RV'ing dictates that grey/blackwater be dumped into specific spots, however, sometimes we go "insanely" out there....

Where a highway turns into a gravel farm road.... For miles and miles. Then turns into two tire tracks for miles and miles. Then the tire tracks vanish and there is desert and rocks (West Texas).

Out here we don't use toilet chems either (for environmental reasons). So rinsing is nice, but freshwater is lean when boondocking.

Anyway, are there any setbacks, considerations, etc., to having a pump from grey to black?

I was considering doing this on my bounder. I'll leave my class C in tact as that Toyota has shower & black tank together anyway.
  • A macerator pump would be a better solution it could be used on grey or the black to break up any pieces while pumping.
  • no need to pump it... just open the grey valve first... then the black valve... and it will seek its own level, done it many times. grey tank always fills up way before black. OH YEA... make sure to keep the outside valve closed :S