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  1. #1
    Join Date
    Mar 2007
    Location
    Nampa, Idaho
    Posts
    601

    Question Galvanized gas supply line and fittings.

    I recently called out the use of galvanized pipe used for some of the gas supply line. Here is what I put in the report.

    A small section of galvanized pipe has been used for the gas supply line to the furnace. Galvanized pipe is steel pipe covered with a protective coating of zinc that greatly reduces its tendency to corrode and extends its life expectancy. It may be used in residential water supply lines, but not gas lines because natural gas causes the zinc to flake off and clog the system.

    A local heating and cooling contractor evaluated the HVAC system and said that the galvanized pipe is ok. He also said that galvanized pipe that was known for the zinc to flake off is no longer made. What do you guys think.

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  2. #2
    Join Date
    Mar 2007
    Location
    Philadelphia PA
    Posts
    3,177

    Default Re: Galvanized gas supply line and fittings.

    Trent - The board archive is a great source of info. I did a quick search and found a thread about various materials, including galvanized, being used for gas. Our resident expert on such things, Bob Harper, replied that all the materials listed were approved for gas.
    Gas Line - approved materials - Home Inspection & Home Inspector Services For Inspections and Inspectors

    "There is no exception to the rule that every rule has an exception." -James Thurber, writer and cartoonist (1894-1961)
    www.ArnoldHomeInspections.com

  3. #3
    Mike Huppi's Avatar
    Mike Huppi Guest

    Default Re: Galvanized gas supply line and fittings.

    In Oregon it is allowed to use on gas lines, I checked with the county.


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