er78mphExplorerJan 01, 2016Flush KingHello 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...Show More
beemerphile1ExplorerJan 15, 2016The only tank I have ever needed to clean is the fresh water tank. I sanitize it twice a year. The black and gray don't need cleaned.
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