Want to move washing machine - vent question

Discussion in 'Remodel Forum & Blog' started by ajohnso5, Jan 9, 2005.

  1. ajohnso5

    ajohnso5 New Member

    Jan 9, 2005
    I want to move my washing machine to another wall of the same room. I want to know the guidelines on the vent for the waste line. Do I need to run a line to my roof? Can I just connect to the drain line if I am close enough to the main vent stack? Thanks for your help!!! - Allison
  2. hj

    hj Moderator & Master Plumber Staff Member

    Aug 31, 2004
    Cave Creek, Arizona

    You do need a vent, unless there are no other plumbing fixtures above the point where you make the connection. If you need a separate vent, then it either has to go through the roof, or connect to an existing one, such as the one at the original location.
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  4. Master Plumber Mark

    Master Plumber Mark Master Plumber

    Feb 6, 2005
    Sensitivity trainer.. plumber of mens souls
    indianapolis indiana - land of the free, home of
    master plumber mark

    why cant this person just tie into the existing drain either in the crawl space or down the wall and install a trap and an auto air vent save lot
    time and expence??? :confused:

    at least this flys ok in the midwest.
  5. Clayton

    Clayton Plumber

    Sep 26, 2004
    Air Admittance Valve

    Although air admittance valves are approved by most large code bodies they still are not allowed by every state or municipality. They are used too much as a short cut rather than a necessity. They are sometimes needed in todays complex building designs and unusual fixture layouts or locations, But one should not install something that can fail so easily and often just to save a dollar when there is a better and safer solution. I have already removed or replaced 5 AAVs during last month because they failed (stuck closed) and they all happened to be installed on washing machines. 2 of them I had to replace, but the others only required a couple ftgs, pipe and flashing and less than an 1 hr labor to vent them through the roof. One home owner was pretty upset to see it was that easy to vent properly, as now they have to replace 2 rooms of new pergo floating floor because of the water damage caused by an air locked drain.
  6. Mike Swearingen

    Mike Swearingen New Member

    Jan 12, 2005
    Independent Real Estate Broker
    On Albemarle Sound In Northeastern NC
    I've had the same air admittance valve on a downstairs lav sink since 1978, and it's still working fine. Maybe I'm just lucky. LOL
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