Good Black flush "trick" or bad idea?
When dumping my tanks, I've got a new "trick". I drain the black water first and let the hose and tank empty out. Then I leave the black valve open, hold the sewer hose up (above the level of the tank...
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I have the twist-on third valve and a clear elbow semi-permanently installed. I use the valve to both backflush the black tank and to equalize the tanks as needed.
