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  1. #1
    Senior Member tictoc's Avatar
    Join Date
    Mar 2004

    drilling bulkheads

    I got my bulkheads...gonna use one 2" for over flow and two 1" for the returns on opposite sides of the tank. but my question is...
    how much bogger than the threaded part of the bulkhead do I make the hole? slightly bigger? or a 1/4 inch bigger? or bigger than that =)

    Any darn fool can make something complex; it takes a genius to make something simple

  2. #2
    Senior Member
    Join Date
    Nov 2003
    For a 2" bulkhead you need a 3" hole; a 1" bulkhead needs a 1.75" hole.

  3. #3
    Junior Member
    Join Date
    Mar 2005
    Go to hit tank fittings this will give you alot of info on bulkhead fittings a hole sizes ...Tom

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