I first open our master dump valve, then the black valve. When the black finishes, close the master valve and open the gray valve to back wash the black tank with gray water. Close the gray valve, open the master valve and let the black drain again. Close the black, open the gray for the final hose rinse. Close the all valves, disconnect and drain the hose, connect the ends together and stow it in the waste bay. Wipe hands with hand sanitizer and get on down the road. I'm just rinsing the hose, not sterilizing it...
