adding bathroom, will vent pipes be large enough?

Discussion in 'Plumbing Code Questions' started by kauaicuda, Jan 10, 2013.

  1. kauaicuda

    kauaicuda New Member

    Joined:
    Jan 10, 2013
    Location:
    Frederick MD
    I am adding a basement bath. My home has a pre-installed vent for a basment bath runs up to the 2nd floor and ties in at the proper place.

    I am concerned about the number of tie-ins at one location for the various vents and Im having a hard time figuring out how to calculate it per the charts and values in the code book.

    The pre-plumbed vent ties into a 2" vent line that currently vents:

    2- 2nd floor bathroom sinks
    1- 1st floor toilet
    1 - 1st floor bathroom sink
    1- kitchen sink
    1- basment wash sink/ washing machine drain

    This vent, line, in turn, ties into the 3" vent stck that goes through the roof that also vents:

    1- 2nd floor toilet
    1- 2nd floor shower


    Will adding may basement bath with a sink, toilet, and shower be too much?

    Thanks in advance,
    Robert
     
    Last edited: Jan 10, 2013
  2. Terry

    Terry Administrator Staff Member

    Joined:
    Aug 17, 2004
    Occupation:
    Plumber
    Location:
    Bothell, Washington
    You can vent three complete bathroom sets with a 2" pipe, assuming that there are also other vents in the home; which yours does.
     
  3. Sponsor

    Sponsor Paid Advertisement

     
Similar Threads: adding bathroom
Forum Title Date
Plumbing Code Questions Adding a new shower Aug 1, 2015
Plumbing Code Questions Adding a utility sink to a laundry room Nov 13, 2012
Plumbing Code Questions Basement Bathroom Layout Jun 7, 2016
Plumbing Code Questions Question about putting bathroom inside bedroom Aug 22, 2015
Plumbing Code Questions Existing Ejector pump layout basement bathroom- is it to code? New York-Suffolk county Oct 14, 2014

Share This Page