Water Heater gas line

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by pilotboat, Nov 21, 2006.

  1. pilotboat

    pilotboat New Member

    Messages:
    3
    Does code allow the supply gas line going into a gas water heater be flexible? or must it be black pipe?
  2. Gary Swart

    Gary Swart In the Trades

    Messages:
    7,397
    Location:
    Yakima WA
    I can't speak for all areas, but in my area, you use black pipe to within a couple of feet or so from the appliance, then a shutoff valve followed by flex line. I can imagine how something like a kitchen stove that was recessed between cabinets could be plumbed otherwise, and without flexibility, it seems to me any appliance would be very difficult to install.
  3. jimbo

    jimbo Plumber

    Messages:
    8,997
    Location:
    San Diego
    This is a local code question. There are places that require hard pipe all the way, and here in California, flex connectors are mandatory.
  4. In KY it must be black iron to the valve. 1/4 turn gas shutoff, drip leg and union ground joint. Not many earthquakes in this area.

    Flex gas lines are only permissable where the appliance (gas stove or dryer) conceals the gas line from damage/possible break from situations around it.
  5. codes vary

    the safest way to run a gas line to any
    applliance is with a flexible SS supply line...from the gas stop.
    especially to the water heater.....


    and they are fantastic time savers if you put in a lot of
    water heaters

    everyone is running wardflex and other SS gas systems
    throughout the whole home, and running a flexible
    gas ine directly do the water heaters everywhere in the
    new home construction.

    so its really just a matter of where you live....

    I had a lady one time pull into her garage and just about drove
    the water heaterinto the living room....

    the water ines were flex, and the gas lines was a flex line so
    nothing bad happenned except she had to buy another heater.
    Last edited: Nov 21, 2006
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