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Thread: Basement laundry question

  1. #1

    Default Basement laundry question

    I want to move my laundry from the 2nd floor to the basement. However, the preferred location is on the other side of the basement from the main stack. The closest drain pipe (from upper floor) appears to be a 2" pipe (~12 feet away) and is in the ceiling. There is a basement bathroom with a shower, toilet, and lav, but is over twice as far away from the preferred location. As another point of information, the washer instructions allow for the discharge to be as much as 8 feet above the floor. I'm concerned about proper venting. What are my venting options? How close does the vent need to be to the washer? Here's a flyer: can an auxiliary vent be created and vented out at just above ground level? I fear I'm in for a major rework.

  2. #2
    Electrician Chris75's Avatar
    Join Date
    Aug 2007
    Litchfield, CT


    Worse case you can get a gray water pump....
    Last edited by Terry; 03-19-2014 at 09:35 AM.

  3. #3
    DIY Senior Member mikept's Avatar
    Join Date
    Jan 2008


    I'm not a pro but you could probably use an AirAdmittanceValve but you cant have an atmospheric vent outside at the ground level because the sewer gases have to dissipate. That area of your house could smell and an open window on that side could get sewer gases blowing back in. I think code sets a certain height above your roof for open vents..

    The higher you push the water the slower your washer pump drains.

    Lastly the washer has to pump up to the trap and the venting has to start there.
    Last edited by mikept; 03-09-2008 at 11:14 AM.

  4. #4


    Thanks for the response. I did some quick research on the Air Admittance Valve. Looks like it will solve the venting question. Assuming this valve is at the washer, how far can I run the discharge "horizontally" (i.e. at 1/4 inch down slope per foot)? In an attempt to hook up the washer discharge to the already existing basement bathroom plumbing (35 feet along the wall), can I "manufacture" an extra deep P-trap to allow for a the longer run and prevent siphoning? I estimate about 9 inches of vertical drop are necessary for this distace.

  5. #5
    Retired Defense Industry Engineer jadnashua's Avatar
    Join Date
    Sep 2004
    New England


    If it is vented properly, you can run it any distance as long as the slope is right.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014


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