Under sink vent

Discussion in 'Toilets and Sinks' started by gcoleman, Jan 6, 2010.

Help Support Plumbing Forums by donating using the link above.
  1. Jan 6, 2010 #1

    gcoleman

    gcoleman

    gcoleman

    New Member

    Joined:
    Jan 6, 2010
    Messages:
    1
    Likes Received:
    0
    Location:
    ,
    Hello,

    I was told that there is a type of vent I can put for a sink that is not properly vented. What kind of vents are there and are they complicated to install?

    Thanks,

    Glenn
    mobility-scooter-reviews.com
     
  2. Jan 6, 2010 #2

    'Cause

    'Cause

    'Cause

    My drains are stopped up

    Joined:
    Jan 5, 2010
    Messages:
    35
    Likes Received:
    1
    Location:
    ,
    There is what has been termed an "island-vent", some jurisdictions won't let you do it.
     
  3. Jan 6, 2010 #3

    Nailer341

    Nailer341

    Nailer341

    Resident Professional

    Joined:
    Jan 6, 2010
    Messages:
    60
    Likes Received:
    1
    Location:
    Long Beach,
    CPC 2007


    909.0 Special Venting for Island Fixtures.
    Traps for island sinks and similar equipment shall be
    roughed in above the floor and may be vented by
    extending the vent as high as possible, but not less
    than the drainboard height and then returning it
    downward and connecting it to the horizontal sink
    drain immediately downstream from the vertical
    fixture drain. The return vent shall be connected to the
    horizontal drain through a wye-branch fitting and
    shall, in addition, be provided with a foot vent taken
    off the vertical fixture vent by means of a wye branch
    immediately below the floor and extending to the
    nearest partition and then through the roof to the
    open air, or may be connected to other vents at a point
    not less than six (6) inches (152 mm) above the floodlevel
    rim of the fixtures served. Drainage fittings shall
    be used on all parts of the vent below the floor level,
    and a minimum slope of one-quarter (1/4) inch per
    foot (20.9 mm/m) back to the drain shall be
    maintained. The return bend used under the
    drainboard shall be a one (1) piece fitting or an
    assembly of a forty-five (45) degree (0.79 rad), a ninety
    (90) degree (1.6 rad), and a forty-five (45) degree (0.79
    rad) elbow in the order named. Pipe sizing shall be as
    elsewhere required in this code. The island sink drain,
    upstream of the returned vent, shall serve no other
    fixtures. An accessible cleanout shall be installed in
    the vertical portion of the foot vent.
     
  4. Jan 7, 2010 #4

    majakdragon

    majakdragon

    majakdragon

    Professional Professional

    Joined:
    Jan 7, 2010
    Messages:
    297
    Likes Received:
    0
    Location:
    Lafe Arkansas, Arkansas
    You have heard about either an island vent or a Studor (name brand) vent which is actually an Air Admittance Valve. They are easily installed but not legal in all areas. Being a mechanical vent, they can go bad and must be installed where they can be changed, not inside a wall. You can go to the Studor website to see these.
     

Share This Page