I have a 2017 Jayco 5th wheel. Before departing the campground I open the black water valve, drain the tank then use the internal tank flush for 15 - 20 minutes. I then close the black and grey water ...
A twist on termination valve is a must have IMO. Even with properly seating drain valves! Also, be sure to add a clear elbow too the termination valve if you don't already have one!