Hope someone can set my mind at ease. I have a 2014 Arctic Fox 5'er and have had it out a couple of times. When I use the Black Tank Flush I'm not sure if it's working. I can hear the water running...
I use the clear elbow. When the black tank is full, by the gauge, I dump it. I then turn on the flush and close the tank valve. I let it, flush, run for 4 timed minutes (40 gal tank) and dump again, watching the clear elbow. Usually it takes at least 3 times for the dump to be clean. Then I shut everything down and add my GOES mix to the tank.