Results 1 to 4 of 4
  1. #1
    Jim Shannonhouse's Avatar
    Jim Shannonhouse Guest

    Default Bathroom Drain Vent

    I've been noticing a foul smell when I turn on the water in our second bathroom. I looked under the sink, and the drain vent comes up higher than the trap, but the vertical vent pipe ends under the sink with a slotted cone cover over the end of the vent. Aren't drain vents supposed to tie into the vent stack that goes up to above the roof, and tie in at a point higher than the the level of the sink?

    Similar Threads:
    Inspection Referral

  2. #2
    Join Date
    Mar 2007
    Location
    Ormond Beach, Florida
    Posts
    26,248

    Default Re: Bathroom Drain Vent

    Quote Originally Posted by Jim Shannonhouse View Post
    I've been noticing a foul smell when I turn on the water in our second bathroom. I looked under the sink, and the drain vent comes up higher than the trap, but the vertical vent pipe ends under the sink with a slotted cone cover over the end of the vent. Aren't drain vents supposed to tie into the vent stack that goes up to above the roof, and tie in at a point higher than the the level of the sink?
    You are describing an Air Admittance Valve (AAV).

    From your description, I would say that it was: a) installed wrong; b) not installed correctly; c) installed not as it should have been installed; d) or is defective and needs to be replaced.

    Usually, from my experience, d) is caused by a), b), or c).

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

  3. #3
    Join Date
    Dec 2008
    Location
    Maryland
    Posts
    2,777

    Default Re: Bathroom Drain Vent

    If it is black then it is the wrong AAV. and has failed.
    Replace with code accepted AAV.


  4. #4
    Join Date
    Mar 2008
    Location
    Charlotte NC
    Posts
    2,303

    Default Re: Bathroom Drain Vent

    Many times small insects like spiders get caught in the seal of the valve, with most of the AAV's I have dealt with you can unscrew the top of the valve and flush them out with water.

    The beatings will continue until morale has improved. mgt.

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •