Sea Chest venting

Discussion in 'Boat Design' started by RDB, Sep 28, 2006.

  1. RDB
    Joined: May 2004
    Posts: 48
    Likes: 1, Points: 0, Legacy Rep: 60
    Location: VAN, CAN

    RDB Junior Member

    I am just wondering about the need to vent a sea chest. Is this so that any air that does get trapeed can escape? Any info on this subject would be great. Cheers
     
    RDB, Sep 28, 2006
    #1
  2. FAST FRED
    Joined: Oct 2002
    Posts: 4,519
    Likes: 111, Points: 63, Legacy Rep: 1009
    Location: Conn in summers , Ortona FL in winter , with big d

    FAST FRED Senior Member

    If the sea chest were deep enough to have the top above the normal waterline , a vent might not become a danger.

    Installed below the WL the vent should be a valve AND a pipe cap.

    FAST FRED
     
    FAST FRED, Sep 29, 2006
    #2
  3. jehardiman
    Joined: Aug 2004
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    Location: Port Orchard, Washington, USA

    jehardiman Senior Member

    Yes a sea chest vent line is to allow the venting of air out of the sea chest when undocking and such. Getting an air lock in the MSW pump really degrades machinery life ;). On large vessels, most are also attached to the LP air system or fire and flushing main to allow debris to be blown off the strainer.
     
    jehardiman, Sep 29, 2006
    #3

  5. RDB
    Joined: May 2004
    Posts: 48
    Likes: 1, Points: 0, Legacy Rep: 60
    Location: VAN, CAN

    RDB Junior Member

    Thanks you both for the help. Thats a good tip on the flushing, I was wondering about that.
     
    RDB, Sep 29, 2006
    #4
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