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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If it works for you O.K.! Not my cup of tea. I drain black then gray then turn on the oscillator to clean everything. Then I shut all valves and put 1/2 cup Blue Dawn in black tank followed with 5 gallons and let it slosh around until I get to next destination, then drain.
