I haven't. I have no idea how to use this new system. I was able to fill my fresh water tank by connecting the hose and switching the valve highlighted yellow to the left (fill only) (see first image below). Turning the valve down is when you are connected to city water. That worked fine as well. I also connected my hose to the "tank flush" port and that is how I added water to my black tank. I was told you should keep a little water in the black tank before using toilets as well as keep the drain valve closed till the tank get 3/4 full then drain it.
The mystery is the rear black tank flush port input at the rear of the coach (see second image below). I hooked up my hose an no water went into the tank (my water flow meter registered zero water flow. What do I have to do to get this to flush/add water to the rear black tank??
Any thought on how to get the rear flush port to accept water?
