Black Tank flush with valve closed

nazpaz wrote:
I hook the water hose to the tank flush and run it till the black water tank is full, then I pull the lever and dump. I leave the tank flush running for around 20 minutes. Then close the valve and let it run another couple of minutes. Shut it down, and I'm good to go another week.

In our 7th year of fulltiming and doing it that way from the beginning.

If you think you can't remember you are running the tank flush, then by all means don't do it that way. :)

WTH you using your black tank for that you need to fill and dump twice then flush for 20 minutes? It's a black tank, its for storing human waste not drinking water. Its going to get full of sh_t again.
I dump mine, throw 5 gallons of water down the commode for a big flush, close the valve, and done.