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Thread: how to unthread black iron fitting

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  1. #1

    Default how to unthread black iron fitting

    Hi, what is the typical method for unscrewing a black iron pipe from a fitting? the pipe is 1" threaded coming out of a 1.5"-1" reducer hung from the ceiling in my basement. Will just two pipe wrenches and some heat work or do I need a special tool?

    thanks

  2. #2
    Forum Admin, Expert Plumber Terry's Avatar
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    Two pipe wrenches should be fine. If that's not enough, sometimes heating the female fitting helps.

  3. #3
    In the Trades Gary Swart's Avatar
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    A couple of other things you might try if two pipe wrenches won't crack it loose are some PB Blaster on the fitting, and/or cheater handles on the wrenches. FWIW, PB Blaster is an excellent penetrating oil. Many folks try WD-40, but that is not a penetrating oil. It has its place, that this isn't one of them. I'd be careful with heat if the fitting is close to the ceiling.

  4. #4

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    thanks!

    Is liquid wrench similar to PB? I've already got some lying around if so. The fitting is probably about6-8" below the open floor joist.

  5. #5
    Retired Defense Industry Engineer jadnashua's Avatar
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    Go ahead and try the Liquid Wrench. Just be very careful if you then try to heat it, as the oil will smoke and burn. Often, all you need is a bigger wrench.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  6. #6
    In the Trades Gary Swart's Avatar
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    Yes, I think Liquid Wrench is a comparable product, PB Blaster may be a tad better, but I've never seen result of a test between the two.

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