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Factory ballast hard tank filling overnight on R20

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    Factory ballast hard tank filling overnight on R20

    My left rear underfloor factory hard tank is auto-filling over night. Has anyone experienced this before? The battery switch is off at night, and when I come back in the morning my boat is always leaning left and when I turn the rear ballast switch to drain, it empties full. Any suggestions?

    #2
    you'll want to make sure your fill hose is routed as high as possible between the pump and where it goes beneath the floor to the tank. With the tank being so low in the hull, it's easy for it to passively fill.
    2013 Z3 - Electric blue and black

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      #3
      Wouldn't it be routed high from the factory? This just started doing it this year.

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        #4
        Originally posted by patryk View Post
        Wouldn't it be routed high from the factory? This just started doing it this year.
        Yes it should have been, but the zip ties may have come loose/undone during the winterization process. Worth a check.
        2013 Z3 - Electric blue and black

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