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 use a third valve and section of clear pipe to do a back flush. Works very well when using the internal flusher is not an option. Usually get three back fills from the gray tank. Last one the water looks like normal gray tank water.
