Venting a kitchen sink

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by jpiazza, Jun 11, 2007.

  1. jpiazza

    jpiazza New Member

    Messages:
    18
    Hi. I'm moving the sink in my kitchen to the other side of the room. There is a bathroom about 10 feet away with it's own dedicated drain and vent stack. Can I vent my new sink by going up to the ceiling, about a 6 foot rise, over to the existing sink, about 10 feet down to the existing vent, about 4 feet, and tie into it there. From there on it vents to the main stack. It will be tying into the vent above the top of the proposed sink. Thanks in advance.
  2. FloridaOrange

    FloridaOrange Plumbing Designer

    Messages:
    1,317
    Location:
    SW Florida
    I don't quite understand your vent. You're not proposing that your vent line go down (elevation) to tie into the other sink's vent are you? If so, that's not permissable.
  3. jpiazza

    jpiazza New Member

    Messages:
    18
    Well sort of. It goes up first, then across then down to the bathroom sink's vent. There the bathroom sink vents to the main stack and out the roof.
  4. FloridaOrange

    FloridaOrange Plumbing Designer

    Messages:
    1,317
    Location:
    SW Florida
    The vent needs to be sloped up, not down. This will allow the sewer gases to escape and any condensation that may form in the vent will drain back into the sewer system.
  5. All vents must slowly rise towards the vent stack. What you are proposing will build what is similar to that of a trap.

    Moisture collection from damp sewer gases along with rainfall accumulations will fill that low spot with no way to drain out. Basically eliminating the vent.
  6. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    27,247
    Location:
    Cave Creek, Arizona
    vent

    It will work as long as condensation can drain out of either end of the horizontal section, although most inspectors would reject it.
  7. jpiazza

    jpiazza New Member

    Messages:
    18
    Thanks for the responses. I don't think there will be a possibility for any condensation to build up as both ends of the vent will be leading directly to waste. So I just need to slope it one way or the other and find the right inspector. Thanks again.
  8. toolaholic

    toolaholic General Contractor Carpenter

    Messages:
    874
    Location:
    Marin Co. Ca.
    Good point

    We're ALL trying to find the RIGHT INSPECTOR !!! PLEEEEZE WHEN YOU FIND HER, SEND HER MY WAY :D
  9. Cass

    Cass Plumber

    Messages:
    5,980
    Location:
    Ohio
    We had the first woman in OH to receive a Master Plumbers Lic. work in the inspection dept. of the county I worked in................she was fair.
  10. toolaholic

    toolaholic General Contractor Carpenter

    Messages:
    874
    Location:
    Marin Co. Ca.
    That's interesting , She said " You were GREAT ";)
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