Hello and thanks to all in advance!! Going to use this apparatus for first time in order to clean out my black tank, do I also clean out the grey tank? When flushing, do I have just the black tank...
My 5'er has a built in spray washer. I let it run for 5-10 mins then use the flush king once which gets quite a bit more out. My guess is the sprayer gets things loose but a back flush is still needed to get the tank clean.