Large Scuppers

Discussion in 'Boat Design' started by rasorinc, Dec 27, 2011.

  1. rasorinc
    Joined: Nov 2007
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    rasorinc Senior Member

    Does anyone have a link for larger scuppers. Lots of 2" and 3" round ones but I'm looking for something the size of a license plate. Thanks, Stan
     
  2. michael pierzga
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    michael pierzga Senior Member

  3. DCockey
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    DCockey Senior Member

    Hamilton Marine
     
  4. rasorinc
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    rasorinc Senior Member

    A scupper I need drains the rear deck either thru the transom or side drain. It has a flap to let water out but does not allow water in. It is to drain a deck if a large volumn of water comes in over the side. Hamilton has nothing on scuppers or drains.
     
  5. michael pierzga
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    michael pierzga Senior Member

  6. DCockey
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    DCockey Senior Member

    Here is a link to scuppers/drains on Hamilton's website: http://store.hamiltonmarine.com/browse.cfm/drains/2,331.html
    Largest is 3" x 9" with a flap.
     
  7. michael pierzga
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    michael pierzga Senior Member

    Other than scuppers the " waterbox technique" were cockpit water drains from normal size, esthetically pleasing 25mm drains set in cockpit corners...then when the cockpit floods, runs overtop of a sile , floods the waterbox, then drains overboard thru sewer pipe size ports. In my opinion Its cheaper , better looking and more effective
     
  8. rasorinc
    Joined: Nov 2007
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    rasorinc Senior Member

    thanks for the find at Hamilton marine. That is what I was looking for. When I typed scuppers on their website that did not show up for me. Appreciate the help from all.
     
  9. DCockey
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    DCockey Senior Member

    A photo or drawing of the "waterbox technique" would be appreciated if possible.
     
  10. viking north
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    viking north VINLAND

    Yes Michael I too would appreciate a drawing, first i've heard of such a system, ---Tnx. Geo
     
  11. michael pierzga
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    michael pierzga Senior Member

    Perhaps I can snap a picture. A stout 12 or so meter twin outboard, alloy salvage workboat, has been recovering a yacht blown onto the beach. She has waterbox style cockpit drains.

    This style works like a dam. Around the perimeter of this work boats aft cockpit, working deck, is a 150mm or so tall dam. This dam runs the perimeter of the working deck , is capped to keep workman feet from getting wedged and is fitted with drain grates cut into the top cap every meter or so . When a wave washes the aft cockpit, Green water escapes thru the grates, out the topsides, thru half moon openings..scuppers ...cut into the topsides. I didnt notice whether there are baffles in the dam arrangement to resist water blowback
     

  12. yipster
    Joined: Oct 2002
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    yipster designer

    recently saw those licence plate scuppers fail on tv, yes there was a failing waterpump
    pumping the boat full in bad weather but than the scuppers did the rest
    belive it or not, they were mounted outside in, boat sunk on tv
     
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