Ed9824v wrote:
AND MY INSTRUCTIONS SAY NOT TO TURN HOSE TO THIS FITTING ON UNLESS THE SEWER IS OPEN
I open my black tank valve and have the flush going at the same time. When it looks like most of the stuff is out I close the valve with the flush running and set my timer for 5 minutes (so I don't forget the valve is closed). I then open the valve and keep the flush going. When the water runs clear I close the valve with the flush still running and count to 60 then shut off the flush valve. Now the tank is thoroughly cleaned. I then fill the toilet bowl i/2 way and add chemicals then flush. Now I am good for one week easily. I also use Charmin no RV approved junk.
I also do the above method the day before I leave, this lets everything slosh around real good without a lot of extra weight.