Are pipe fittings having a visible line in them, are cracked?
No. The noticeable line is not a crack. This you can test by trying to open the crack. If you are unable to open it up by pulling on the part then that is knit-line which is an intrinsic part of the injection-molding process. A knit-line will not impact the integrity of the pipe fitting.
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  • Accepted Answer

    Tuesday, April 09 2013, 04:05 AM - #permalink
    Lines in your pipe fittings are not necessarily cracks. Try to open them with your fingers. If you can’t, these lines are knit-lines, and are meant to be there.
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