(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 8 of 8

Thread: Cast iron short sweep horz-horz connection exception (UPC)

  1. #1
    DIY Senior Member DavidTu's Avatar
    Join Date
    Dec 2009
    Location
    Seattle, WA
    Posts
    229

    Default Cast iron short sweep horz-horz connection exception (UPC)

    I have a quick reference flip book that indicates there is an exception allowing CI short sweep 90s to be used on horizontal to horizontal drain line connections for 2" and smaller pipe. I cannot find this in the UPC code itself. Is this exception well-known and can anyone reference or quote the code supporting it?

  2. #2
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Location
    Cave Creek, Arizona
    Posts
    25,653

    Default

    NEver heard of it. Might by apocryphal.

  3. #3
    Master Plumber-Gas Fitter shacko's Avatar
    Join Date
    Jan 2006
    Location
    Rosedale, Md
    Posts
    561

    Default

    I can't find any exceptions, the book I have only allows long sweeps, short sweeps but no 1/4 bends.

  4. #4
    Forum Admin, Expert Plumber Terry's Avatar
    Join Date
    Aug 2004
    Location
    Bothell, Washington
    Posts
    14,202
    Blog Entries
    1

    Default

    The only time you could flip them horizontal would be on a trap arm.

  5. #5
    DIY Senior Member DavidTu's Avatar
    Join Date
    Dec 2009
    Location
    Seattle, WA
    Posts
    229

    Default

    Quote Originally Posted by shacko View Post
    I can't find any exceptions, the book I have only allows long sweeps, short sweeps but no 1/4 bends.
    Well, that's the thing... are you saying you see UPC approving short sweep for 90-deg turn in horizontal run? I'm going from memory as my code book is at jobsite... but I thought it indicated only a Combo-wye or "equivalent sweep"; when I compared the short sweet (cast iron keep in mind) to the combo the sweep was noticably less.

    Oops... looks like I cross-posted w/ Terry... that sounds pretty definitive (and not in a good way
    Last edited by DavidTu; 05-14-2010 at 05:03 PM.

  6. #6
    DIY Senior Member DavidTu's Avatar
    Join Date
    Dec 2009
    Location
    Seattle, WA
    Posts
    229

    Default More Generally: CI vs ABS

    Maybe I can broaden my question, because I don't understand why the dims on CI and ABS are so different for the same sized pipe.

    Below is a set of drawings taken from CharlottePipe.com showing dims for CI on the left and ABS on the right. Some points of note: the CI Short Sweep is larger than the ABS Long Sweep (compare CI-SS 'D' to ABS-LS 'B'); the CI 1/4 Bend is approximately the size of the ABS Long Sweep (compare CI-QB 'D' to ABS-LS 'B'); the ABS Combo is a much larger turn than the ABS Long Sweep (compare ABS-CB 'A' to ABS-LS 'A').

    So, based on this it would seem fair for CI Short Sweep to be used in places that ABS Long Sweep can be used. For that matter, given the dims for CI Quarter Bend vs. ABS Long Sweep it'd seem like that could be used in the same places (as a practical point, not by code). So... what's going on here? Can someone explain the logic of all of this?


  7. #7
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Location
    Cave Creek, Arizona
    Posts
    25,653

    Default

    quote; Can someone explain the logic of all of this?

    You are asking an engineer or a bureaucrat to be "LOGICAL"?

  8. #8
    DIY Senior Member DavidTu's Avatar
    Join Date
    Dec 2009
    Location
    Seattle, WA
    Posts
    229

    Default

    Quote Originally Posted by hj View Post
    You are asking an engineer or a bureaucrat to be "LOGICAL"?
    I guess I always expect the best from people.

    I only dug out all of this info b/c I'd gone to HD and bought a bunch of 2" ABS and when I went to grab an ABS LS-90 for a vert to horz transition.... I kept digging and digging in the pile of parts looking for an 'appropriately' sized piece w/ a sweep about that of the Combo-wye.... when I couldn't find that I decided I'd failed to buy LS-90's... until I looked up the specs and found I had them all right, but still they seemed all wrong.

    So essentially ABS has three sizes for 90's: the vent-90, the 1/4 bend and the LS-90. Correct? And the 1/4 bend can only be used for horiz-to-vert transitions?

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •