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Thru Hull size

Discussion in 'Catalina 310' started by BC Bernie, Jun 26, 2018. Add this thread to a FAQ

  1. BC Bernie

    BC Bernie

    Joined Aug 29, 2016
    35 posts, 6 likes
    Catalina 2004 310 (Hull #250)
    CA BC
    Can someone please let me know what the size(s) of the thru hulls are? Can’t seem to find it in the manual.

    Last edited: Jun 26, 2018
  2. Dave Groshong

    Dave Groshong SBO Staff Staff Member

    Joined Jan 25, 2007
    1,368 posts, 107 likes
    Catalina 22
    US Seattle

  3. Benny17441


    Joined May 24, 2004
    5,635 posts, 388 likes
    CC 30
    US South Florida
    Any Chandlery will sell you a pack of assorted sizes. The fact that they are tapered make most interchangeable.

  4. jon hansen

    jon hansen

    Joined May 25, 2012
    1,346 posts, 823 likes
    john alden caravelle 42
    us sturgeon bay, wis
    use any cub scout knife to adjust to your needs

  5. marchem


    Joined Nov 16, 2012
    691 posts, 97 likes
    Catalina 310, 2000, #31
    US Santa Cruz
    All 6 on our 2000 C310 are 3/4”. Forespar Series 93, Marelon. Macerator, Two Sinks, Head intake, Shower/Reefer Drain, and Engine intake. But there’s no guarantee that you’ve got the same size, or they’re in the same locations, or you don’t have more or less...

  6. KZW


    Joined May 17, 2014
    597 posts, 52 likes
    Catalina 310 #307
    US Bluewater Bay, FL
    Mine are 3/4: Head sink, A/C, galley sink, raw water intake for head. Macerator and raw water intake are larger, at least 1:

    BC Bernie likes this.
  7. marchem


    Joined Nov 16, 2012
    691 posts, 97 likes
    Catalina 310, 2000, #31
    US Santa Cruz
    So they did change sizes along the way. Not surprising.

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