Max Distance/Slope for Under-Slab Wet Vent

Discussion in 'IPC Plumbing Code Questions' started by djm284, Jun 1, 2016.

  1. djm284

    djm284 New Member

    Jun 1, 2016
    Arlington, Virginia
    I'm a non-plumber roughing-in DWV for a new bathroom in my basement. Wet venting everything through the sink vent/drain. For venting the toilet, I'm having trouble interpreting from the code if, for a given slope, there is a maximum length between the wye labelled 'A' in the picture below and point 'C' where the wet vent will go vertical, or is there only a maximum length between the toilet and point 'A'?

    Right now the slope between A and C is 1/2 in per ft. and the length is a little over 6 ft. I can adjust the slope down to 1/4 in per ft if needed.

    Initial Rough In_Labelled_2.gif
  2. hj

    hj Master Plumber

    Aug 31, 2004
    Cave Creek, Arizona
    It is more complicated than necessary, but should work.
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