Venting a new drain

Discussion in 'Toilet Forum discussions' started by rice9923, Apr 14, 2005.

  1. rice9923

    rice9923 New Member

    Apr 13, 2005
    Adding a new drain which consists of two sinks in my basement.
    Do not have access to the existing vent system. I must run a new
    vent to the outside of my house for this system.
    QUESTION: What is the mininum diameter pipe that can be used for this vent?

  2. hj

    hj Moderator & Master Plumber Staff Member

    Aug 31, 2004
    Cave Creek, Arizona

    1 1/2" in most cases.
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