Question about toilet venting requirements

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by scottgibson, Oct 6, 2009.

  1. scottgibson

    scottgibson New Member

    Messages:
    3
    Location:
    Ottawa Canada
    Hi All, I'm planning on adding a toilet in the basement of our house, The toilet will be about 24" from a vent stack. I was hoping to hook things up as indicated in the diagram below. Is this a valid way to hook it up? Or will I need an additional vent.

    Thanks,

    Scott

    http://moddedreality.dreamhosters.com/public/plumbing%20diagram.png

    Attached Files:

  2. jdgoodman

    jdgoodman Journeyman Plumber

    Messages:
    32
    Location:
    Seattle
    No you will need to vent the new toilet in the basement seperatly.
  3. Terry

    Terry Administrator Staff Member

    Messages:
    14,943
    Location:
    Bothell, Washington
    Last edited: May 24, 2010
  4. nhmaster

    nhmaster Master Plumber

    Messages:
    3,189
    Location:
    S. Maine
    Something like this.

    [​IMG]
    Gold star added by Terry

    Attached Files:

    Last edited by a moderator: Oct 6, 2009
  5. Basement_Lurker

    Basement_Lurker One who lurks

    Messages:
    668
    Location:
    Victoria, BC
    If that really is a 4" stack with only one fixture on it (a shower perhaps?) on the second floor, then you could wet vent a toilet on the first floor. But a 4" line for just one fixture is overkill....you better verify what is connected to that line, otherwise, you will need to vent that toilet as nhmaster has shown.
  6. nhmaster

    nhmaster Master Plumber

    Messages:
    3,189
    Location:
    S. Maine
    No ya can't. You can't wet vent anything with fixtures above.
  7. scottgibson

    scottgibson New Member

    Messages:
    3
    Location:
    Ottawa Canada
    Hey all, thanks for the feedback. My diagram simplified things a little. There is a toilet, shower and sink above. So I guess I need to find a way to tap into a vent line (I'll have to open up the wall in the floor above)

    How far away from the toilet flange can I attach the 'Y' for the vent? I only have 24" before the stack.

    Thanks again,

    Scott
  8. scottgibson

    scottgibson New Member

    Messages:
    3
    Location:
    Ottawa Canada
    Something like this?

    Attached Files:

  9. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,537
    Location:
    Cave Creek, Arizona
    toilet

    That is one way, but only a physical examination would tell if it was the best way. Where did the lavatory come from? That would have changed the above answers, even the wrong ones.
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