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Thread: CPVC ?

  1. #1
    Join Date
    Oct 2003
    Location
    Rockwall Texas
    Posts
    4,517

    Default CPVC ?

    Do you call out CPVC on top of a gas water heater when it is close to the exhaust?

    I always have called it out as being a risk for heat damage but all the plumbers around say its ok.

    Any feedback.

    rick

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  2. #2
    Join Date
    Mar 2007
    Location
    Spring City/Surrounding Philadelphia area
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    Default Re: CPVC ?

    I would still call it Rick. If the plumbers want to take ownership of that flood-to-be, I say let em' have at it. If I remember correctly, CPVC is only stable for temperatures up to 180 degrees and that's from water in the pipes. I could see the pipe melting if you get a water heater that has a backdrafting issue or even if it is firing for an extended period of time due to usage of a lot of hot water (bathing, washing machine running at same time).


  3. #3
    Join Date
    Mar 2007
    Location
    Ormond Beach, Florida
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    Default Re: CPVC ?

    Quote Originally Posted by Rick Hurst View Post
    Do you call out CPVC on top of a gas water heater when it is close to the exhaust?
    Rick,

    It is required to be 6" from the drafthood, 6" from single wall vent, and 1" from Type B gas vent.

    Let the plumbers say it is okay an do it, you just give them the code section/manufacturers' installation instructions which tells them *not* to do it.

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

  4. #4
    Join Date
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    Rockwall Texas
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    Default Re: CPVC ?

    This is the one in question.

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  5. #5
    Join Date
    Mar 2007
    Location
    Ormond Beach, Florida
    Posts
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    Default Re: CPVC ?

    Rick,

    From the draft hood it requires 6" clearance to *all* combustible material: the CPVC, the foam insulation, etc.

    That's not even addressing the effect of the heat on the CPVC, just that the CPVC is 'combustible'.

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

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