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Thread: Trouble with 1" nipple onto 1" 200 psi poly tubing

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  1. #1
    DIY Junior Member grizz's Avatar
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    Jun 2012
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    Colorado
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    Default Trouble with 1" nipple onto 1" 200 psi poly tubing

    I'm having a little trouble trying to fit a 1" brass nipple onto my 200 psi poly tubing. Is it ok to heat up the poly tubing with a torch to get the fitting on? The tubing is blue on the outside and white on the inside. If heating is ok, should I heat both the outside and inside of the poly tubing?

  2. #2
    DIYer, not in the trades LLigetfa's Avatar
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    I use a heat gun and make it just hot enough that it still takes effort to get it on.

  3. #3
    General Engineering Contractor ballvalve's Avatar
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    Agreed - and good effort. If it gets too hot it de-cross links and later you get a lost pump. Hot water is best, but even a hair dryer will work. Use GOOD clamps, 3 and install them while its still warm - retorque them a bit later with a nut driver, not a screwdriver.

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