I am not sure about closing the valve, I never have. I would be afraid of over filling the tank, especially running the flush for 4 minutes. I leave the valve open and run for 3 to 5 minutes. A few times a year, I will fill the tank about 3/4 full when traveling.
After you use the tank, the sensors will not work. Most people never worry about them and dumps the tank when it does a burp like function when you flush (hard to explain, but you will notice it when it happens).
__________________
Jim and Carole
Roseville, MN
2018 RAM 3500 DRW, Diesel, Long Box, Air Lift Bags - 2020 Montana HC 381TH, Sailun S637
|