Washing Machine Standpipe...Remedy An S-Trap

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by Hammerlane, Jul 4, 2012.

  1. Hammerlane

    Hammerlane Member

    Joined:
    Oct 22, 2011
    Location:
    Ohio
    In the diagram below, will either sketch 2 or 3 remedy a washing machine standpipe that has an S-trap(sketch 1)
     

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    Last edited: Jul 4, 2012
  2. johnjh2o1

    johnjh2o1 Plumbing Contractor for 49 years

    Joined:
    Aug 9, 2009
    Occupation:
    Retired
    Location:
    South*East
    #3 is the correct way. #2 is still a S trap.

    John
     
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  4. hj

    hj Moderator & Master Plumber Staff Member

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    Aug 31, 2004
    Occupation:
    Plumber
    Location:
    Cave Creek, Arizona
    aan "S" trap is an "S" trap no matter how far apart the legs, or even the size of the legs. # 3 is the only proper design that you show.
     
  5. SteveBath

    SteveBath New Member

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    Absolutely #3 is the proper design ... you would be able to quickly tell if you could connect a washer and drain it into each one of these 3 designs. It would be very obvious very quickly
     
  6. hj

    hj Moderator & Master Plumber Staff Member

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    Aug 31, 2004
    Occupation:
    Plumber
    Location:
    Cave Creek, Arizona
    IF all he wants to do is drain the washing machine, ALL of them would work. The key is whether he wants to do it properly or not, and some people cannot be bothered with "proper".
     
  7. SteveBath

    SteveBath New Member

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    Self Employed
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    You are right about the "proper" LOL ... I used to go out to clients years ago who lived in older houses that would buy new washing machines - their existing drain lines could not handle the increased drain rate of the new machine - even though their drain lines would be perfectly clear ... either the drain piping was too small or had too many bends ...
     
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