ABS Sanitary Tee cracked

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by eurob, Feb 16, 2013.

  1. eurob

    eurob In the trades

    Messages:
    446
    Location:
    Montreal
    I purchased the 2 Tees 4 x4 x2 from a big box store and when I wanted to install them I noticed some crack looking on them . After talking to the plumbing associate about it , he assures me that there is nothing wrong with them . I went today to take a look at another big box store at the same item and it looks perfect .

    Am I or will I be in trouble if installing them ? Here are some pics .

    ABS Sanitary Tee cracking 1.jpg ABS Sanitary Tee cracking 2.jpg ABS Sanitary Tee cracking 3.jpg ABS Sanitary Tee cracking 4.jpg
  2. cacher_chick

    cacher_chick Test, Don't Guess!

    Messages:
    3,236
    Location:
    Land of Cheese
    We don't use ABS here in this area, but I would guess that those are marks from the mold that the fittings were made in. I don't think I would be concerned about it.
  3. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,251
    Location:
    Cave Creek, Arizona
    Those are mold marks, not cracks.
  4. eurob

    eurob In the trades

    Messages:
    446
    Location:
    Montreal
    I can assure you that those are not or looking like any mold marks I've ever seen . It looks more like shrinking stress cracks and they are carried from one side to the other of the thickness -- meaning you can clearly see it on the inside as well as on the outside and follow the exact same path on the Tee .

    I hope you are right hj , thank you .
  5. denikar

    denikar New Member

    Messages:
    13
    Location:
    Canton, MI
    They are mold marks. From the picture there are at least three injection points where they inject the ABS material into the mold. The lines you see are where the material meets up inside the mold from each injection point as it is filled. Nothing to worry about.
  6. kreemoweet

    kreemoweet New Member

    Messages:
    371
    Location:
    Seattle. WA
    Easy to test: put some significant "stress" on those pieces. If the so-called "crack" doesn't open up then it most likely isn't.
    I've seen genuine cracks on ABS fittings from the BigBox, but I'm sure it was from some jerk returning his oops to the store
    and some clueless clerk tossing them back in the bin.
  7. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,251
    Location:
    Cave Creek, Arizona
    And you REALLY believe that a "stress crack" would be EXACTLY the same on both fittings and on both sides?
  8. eurob

    eurob In the trades

    Messages:
    446
    Location:
    Montreal
    Using the same manufacturing technique it is possible for the stress to be located on the same area . It may be interpreted as a '' cold joint '' during fabrication but , since I didn't see anything like these before I don't know if it is safe -- in the long run -- to be installed . It may be '' nothing to worry about '' , but would someone install them and warranty the job ?

    For now, I will keep them as a reminder '' to check them before buying them '' . FWIW , all of the Tees 4x4x2 from the respective BBS had the same '' ........ '' on them .

    Thanks guys.
  9. jimbo

    jimbo Plumber

    Messages:
    8,997
    Location:
    San Diego
    Going back 20ish years I worked for a manufacturer of telephones, and other consumer products. I had quite a bit of involvement with plastic injection molding in Hong Kong and Mexico. I do believe we are looking at mold marks, but my memory banks are failing me. It may be "normal" for this grade of product. It could be due to faulty temperature control of the mold. Here is a forum where you may be able to get a very knowledgeable opinion on those photos:
    http://www.linkedin.com/groups/plastic411-com-forum-plastic-experts-2644080/about

    If you find out anything, we would very much appreciate some feedback.
  10. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,251
    Location:
    Cave Creek, Arizona
    And I am sure those from my wholesaler will also have them, but I will have to check tomorrow.
  11. eurob

    eurob In the trades

    Messages:
    446
    Location:
    Montreal
    Thank you Hj & Jimbo.:)

    I will try to ask the experts at the link provided and if relevant infos become available , I will let you guys know .
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