Ditto rlh1957.........recommend connecting the black tank flush hose ONLY when adding water to the holding tank AND during tank flushing/dumping, otherwise keep it disconnected from the rv flush connection. Yhis mitigates the risk of wwater leaking through the valve and overfill the black tank.
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2020 Montana 3780RL fifth wheel
2016 F-350 Crew Cab long bed 4x2 DRW 6.7L Diesel
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