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Thread: ABS and hot air ducting

  1. #1
    DIY Junior Member vancouver's Avatar
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    Default ABS and hot air ducting

    I'm running 2" ABS across some hot air ducting in a floor between joists. Should I protect the ABS from the heat or does it matter?

  2. #2
    Master Plumber-Gas Fitter shacko's Avatar
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    With the temperature that you run heating duct you shouldn't have a problem, I would not lay the pipe on the duct.

  3. #3
    DIY Junior Member vancouver's Avatar
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    That's what I was thinking. Is there anything I could wrap around the pipe to deflect the heat? There isn't much room between the pipe and duct.

  4. #4
    Engineer Furd's Avatar
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    If the duct is in an unheated space it really should be insulated. While ABS WILL soften and can deform when heated it will take a lot more heat than it will ever see even a 1/2 inch away from a residential heat duct.

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