I was a little skeptical of how good this thing was going to work. So after I drained the black tank, I hooked up the water hose and turned it on. With the tank valve open, I let it run for a minuter or so. I was thinking this isn't really going to do much. Well, once the water started coming out, I was amazed at how much "stuff" came out with it. Jerry.
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2005 GMC Sierra 2500HD, Duramax CC/SB
2022 Rockwood 2613 BS
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