Forum Discussion
stripit
Aug 08, 2017Explorer
I always used Flush King when I wanted to really clean the tanks, black and grey. Using this product forces water back up into the tank and then open the valve and see what comes out. It might take many trys but eventually you will see only clear water discharge. Kept my gauges reading pretty close to accurate. I also used Calgon between dumping to help clean the tanks.Flush King
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