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Help Identifying Above Waterline Thru Hulls-gctid814606

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    #1

    Help Identifying Above Waterline Thru Hulls-gctid814606

    Bayliner 3870. . .there is a cluster of 5 thru hulls just aft of the galley sink drain and below the holding and water tank vents. Process of elimination leads me to believe 2 are for the forward bilge pumps, and one for the macerator? If one is the macerator discharge, that's kind of gross but then. . .what are the other 2 for?

    thanks!
    . . .It places the lotion in the Basket. . .and that basket happens to be in a 1987 Bayliner 3870 w/ Hino 175's
    Tags: None
    #2
    At least one of the other two is the black water tank vent.
    Jim Gandee
    1989 3888
    Hino 175's
    Fire Escape
    [email protected]
    Alamitos Bay, SoCal

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      #3
      This is from memory, and might not be completely correct...but...one is ac/heat seawater pump (there are two for the ac/heat units, one on the bow, and one midship), one is galley sink drain, one is forward automatic bilge pump, one is forward manual bilge pump, and I believe the remaining one is the holding tank macerator discharge.

      On the starboard side, there are also thru-hulls for the master head sink drain, shower sump pump, and front AC/heat, but I believe all of those are forward on the bow. I believe the only thru-hull on the port side is the sink drain for the guest head.

      UPDATE: Actually, I may have gotten two of them mixed up...IIRC, the shower/tub drain pump is under the galley floor, so that 5th thru-hull midship is probably the shower drain. The macerator pump is up front, so one of the bow thru-hulls is probably the holding tank discharge. Turn the shower and shower pump on, and check which one it's coming from.

      Again, this is from memory and might not be 100% correct. :P

      Cheers,

      Dave

      Comment

        #4
        ah hah!

        I forgot about the shower disharge. . .so I'm down to one mystery thru hull to be identified.

        Thanks!
        . . .It places the lotion in the Basket. . .and that basket happens to be in a 1987 Bayliner 3870 w/ Hino 175's

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          #5
          No prob. One of the midship thru-hulls is for the galley sink drain...so that would be the five, I think.

          Dave

          Comment

            #6
            that's it! I confused the master head for the galley sink drain. . .so yeah, that should account for all of them!

            Thanks!
            . . .It places the lotion in the Basket. . .and that basket happens to be in a 1987 Bayliner 3870 w/ Hino 175's

            Comment

              #7
              If I recall, the upper aft is the Upper Midship bilge, the upper fwd is the head OVBD if the wye valve is in that orientation. The lower aft is the shower, the middle lower is the macerator pump and the fwd lower is the lower mid ship bilge

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