1. aaron_808

    aaron_808 New Member

    Joined:
    May 18, 2020
    Location:
    San Jose, CA
    Hi all,

    On a horizontal run, is there a preference between using a wye or combo if you have a choice? The wye has less change in direction and has a shorter run, but maybe a combo has a smoother transition? Is one less prone to clogging? Or am I just overthinking this? If anything, is one way standard?

    Thanks!
    -Aaron
     

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  2. Terry

    Terry Administrator Staff Member

    Joined:
    Aug 17, 2004
    Occupation:
    Plumber
    Location:
    Bothell, Washington
    The less change of direction the better. I use wyes whenever I can.
     
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  4. aaron_808

    aaron_808 New Member

    Joined:
    May 18, 2020
    Location:
    San Jose, CA
    Wyes it is then. Thank you!!
     
  5. wwhitney

    wwhitney Active Member

    Joined:
    Mar 17, 2019
    Location:
    Berkeley, CA
    If you're running through joists, the solution with wyes may require extra holes. And multiple holes through the same joist have to be separated by at least 2" of wood, which will limit your wye placement somewhat.

    Personally, if it would reduce the number of holes in joists by 2 or more, I'd go with combos.

    Cheers, Wayne
     
  6. hj

    hj Moderator & Master Plumber Staff Member

    Joined:
    Aug 31, 2004
    Occupation:
    Plumber
    Location:
    Cave Creek, Arizona
    I use combos for a 90 degree turn. Since the 45 bend can point directly to the end point THEN I would use a Y.
     
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