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  1. #1
    Join Date
    Mar 2007
    Location
    Oregon
    Posts
    2,365

    Default confusing waste plumbing

    I can't make any sense of the 2" T coming off the mainline????

    Whatever it is, it appears to have been this way since 1979 when the place was built.

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  2. #2
    Join Date
    Mar 2007
    Location
    New Mexico
    Posts
    1,258

    Default Re: confusing waste plumbing

    That's a weird one. Sump pump or lift pump below? Even so, the T would be backwards.

    Jim Robinson
    New Mexico, USA

  3. #3
    Join Date
    Feb 2009
    Location
    Southern Vancouver Island
    Posts
    4,546

    Default Re: confusing waste plumbing

    Yeah, what Jim said, a sewage ejector pump from a sump in the basement, backwards Tee. It would still be wrong with the Tee turned around, BTW.


  4. #4
    Join Date
    Mar 2007
    Location
    Oregon
    Posts
    2,365

    Default Re: confusing waste plumbing

    Thanks guys... actually, there was an ejector pump below. I was almost thinking of a primer of sorts to keep something in it? But that really doesn't make sense.

    It goes against the number one plumbing rule that pipe can never reduce in size (I know, I know, "stuff" always rolling down hill is actually number one ) There are two toilets just a few feet upstream and I'd have to think the smaller pipe at the T is totally plugged.

    I'm glad to see you guys share my confusion.... I just wrote it up as a non-recognized installation/design and to look into it further.


  5. #5
    Join Date
    Mar 2007
    Location
    Ormond Beach, Florida
    Posts
    26,244

    Default Re: confusing waste plumbing

    Unless that is a vent (and a very large at that) then it is completely wrong ... ALL the waste in that line is going to go down that tee.

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

  6. #6
    David Bell's Avatar
    David Bell Guest

    Default Re: confusing waste plumbing

    If the picture was upside down it would be ok, but really there must be a check valve in the line up to the backwards t-wye or some serious stink would be going back to the pump.


  7. #7
    Join Date
    Jul 2009
    Location
    Lanham, MD
    Posts
    86

    Default Re: confusing waste plumbing

    Likely a vent stack as evidenced by the fixture vent lines in the lower area of photo. Perhaps the homeowner had the original 4" stack relocated to free up an area above the original location in the center of the home.
    If indeed a vent stack, no real problem exists.


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