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Old 12-13-2011, 04:29 PM   #8
JRTJH
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Join Date: Mar 2011
Location: Gaylord
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Our trailer didn't come with a black tank flush system, I went to CampingWorld and bought one off the rack. It isn't connected to the fresh water system at all. In fact, it is a hose connection, hose, one way valve and a rinse head.

I realize that for convenience, so there is only one water hose connection at the side of the RV, the black tank flush system can be connected to the fresh water supply and then "isolated" with an antisiphon valve, but with the hassle of frozen valves, flooded bathrooms, I wonder if it's really a convenience or not.

Maybe, just disconnecting it from the fresh water supply, routing a water supply to the flush device on the side of the black tank and not having to deal with valves in the wall is a simpler solution than being in the middle of nowhere, at a truck stop, dumping the tank and finding the rest of your vacation is "down the drain" because of a busted valve in the wall.....
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