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Sunbridge 3450 Holding Tank Dischange

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    Sunbridge 3450 Holding Tank Dischange

    Hello -

    Brand new here...just bought an 88 3450...really excited. This replaces my Carver 3257 that was totalled by a barge.

    My carver had a discharge Yvalve in line with the pump out line. I noticed there is a discharge switch on the panel but I haven't looked close enough at the system to see if it is functional. Can't dump in the river of course, but, I do want it function as it also has uses when on blocks.

    Anyone have experience with the 3450?


    1988 Bayliner Avanti 3450 Sunbridge
    ​​​​​​1989 Carver 3257 Montego

    Most Bayliners of this era had two independent ways to dump overboard:
    1. Y-valve connected to the toilet outlet hose, with one side of the Y going to the holding tank and the other side going to a thru-hull. This allows the toilet to pump to the holding tank or directly overboard.
    2. Macerator pump plumbed between the holding tank and a thru-hull. This allows the holding tank to be emptied overboard.
    The switch you found is for the macerator pump.
    1999 3788, Cummins 270 "Freedom"
    2013 Boston Whaler 130 SS
    Anacortes, WA