size vent

Discussion in 'Drain Cleaning' started by el pacha, Nov 24, 2011.

  1. el pacha

    el pacha In the Trades

    Nov 24, 2011
    New York
    i got 2 problems,
    1. how much should be the minimum diameter of a circuit vent totaling 55 feet developed length and serving a horizontal drain branch, handling 120 dfu's?

    2.a vent stack handling 25 dfu's with a developed lenght of 35 feet, how much should be the minimum of diameter?
  2. hj

    hj Moderator & Master Plumber Staff Member

    Aug 31, 2004
    Cave Creek, Arizona
    1. If you do not already know the answers to these two questions, you may be doing a job you are not qualified for.
    2. Your blueprint, which you used to get your permit, should have these sizes specified on its plumbing diagram.
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