Black Tank Flushing

[DHenry]

I dump the black tank and start the black tank flush. I will close the vent for about 2 minuets at a time and flush until I see the water become clear (I have a clear elbow on the end of the drain). I flush about 3-4 times and then empty both the grey tank and the galley tank, then flush the hose with water for another 5 or so minuets. The whole process takes me about 30 minuets but I am happy to spend that time knowing that I have thourghly flushed the lines out.