Where to tie in new basement vent

Discussion in 'IPC Plumbing Code Questions' started by Greg Reed, Feb 16, 2020.

  1. Greg Reed

    Greg Reed New Member

    Joined:
    Feb 16, 2020
    Location:
    Colorado
    Sorry for the newbie question, but I really haven't found the clear answer to this anywhere.
    I'm adding a basement bathroom to a 2-bedroom house. There are two soil stacks coming into the basement - one serving a 1/2 bath on 1st floor, and full bath on 2nd floor. Basement bath will be below this. 2nd soil stack serves basement laundry, kitchen on 1st floor, and master bath on 2nd floor. There is a vent pipe running up from the laundry drain to somewhere ...

    My question - the new vent for the basement bathroom group - does this have to run all the way to the attic to tie in to existing dry vents?
    OR - can it tie into a dry vent in the 1st floor 1/2 bath?
    OR - can I run the new dry vent along basement ceiling to tie into that existing laundry drain vent?

    Property is Denver CO area, using 2018 IPC
     
  2. Reach4

    Reach4 Well-Known Member

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    IL
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  4. Greg Reed

    Greg Reed New Member

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    Feb 16, 2020
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    Colorado
  5. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    That requirement is that you tie in 6 or more inches above the flood level that vent serves. The vent for the basement laundry standpipe or sink only serves basement stuff. So you could tie into that at least 6 inches above the top of the standpipe or rim of the laundry sink.
     
  6. Smooky

    Smooky In the Trades

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