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  1. #1
    Join Date
    Sep 2019
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    Navien hot water heater

    I am in Ontario however don’t think it matters. Flex gas connectors like what you would see on the back of a stove hooked up to a Navien hot water heater. I have never seen this connector used for anything other then a stove and gas dryer. If this was legal than we would scrap expensive gastite fittings. Someone tell me I am wrong and this is legal where they are from.

  2. #2
    Join Date
    Jan 2007
    Location
    Mn the state where absolutey nothing is allowed
    Posts
    2,426
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    just because its legal doesn't mean its not stupid......

    did you have an actual question?
    my boss thinks its possible to repeal the laws of physics

  3. Likes heatingman liked this post.
  4. #3
    Join Date
    Jul 2013
    Location
    Richmond, VA
    Posts
    4,813
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    I mean, if it carries the rated capacity, what's the difference if you use Gastite or an appliance connector?

  5. Likes Vinnie_NJ liked this post.
  6. #4
    Join Date
    Sep 2015
    Location
    Ontari-ari-ari-o
    Posts
    1,776
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    The code doesn't say that you can use them like that.

  7. #5
    Join Date
    May 2006
    Posts
    3,680
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    its called a WATER HEATER not a hot water heater if it was allready hot you would not need to heat the water

  8. #6
    Join Date
    Jul 2018
    Location
    Wisconsin
    Posts
    1,103
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    Just put in A NTI boiler and the instructions say to use a flex gas line if approved by local code. This is so stress on internal components is not possible.

    Sent from my SM-G960U using Tapatalk

  9. #7
    Join Date
    Nov 2006
    Location
    Athens, Ohio
    Posts
    7,313
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    I don’t know why anyone feels a need to heat hot water. It makes more sense to heat cold water to make it hot.
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  10. Likes BALloyd liked this post.
  11. #8
    Join Date
    Dec 2019
    Posts
    10
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    In Alberta that is against the b149 code.

  12. #9
    Join Date
    Dec 2004
    Location
    Chicago area
    Posts
    8,761
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    Quote Originally Posted by ch4man View Post
    just because its legal doesn't mean its not stupid......

    did you have an actual question?
    In Texas I would see them installed on RTU’s.

    Weather it was allowed or not, it really looked like a hack job.

    My opinion, anything thats not intended to be moved for service should be hard piped.

    Learn how to support pipe and measure, and there is no pipe stress on the appliance.




    Sent from my iPhone using Tapatalk

  13. #10
    Join Date
    Jul 2018
    Location
    Wisconsin
    Posts
    1,103
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    Some manufacturers prefer a flex connector when code allows

    Sent from my SM-G960U using Tapatalk

  14. #11
    Join Date
    Apr 2007
    Location
    Tucson, Arizona
    Posts
    1,300
    Post Likes

    Navien hot water heater

    All gas appliances are required to have an appropriately sized flexible gas connector (these are single use items BTW) in my area, due to it being a seismic zone. In the event of an earthquake, all rigid piped gas lines would break and cause many fires. I believe that code started after the huge earthquake in San Francisco area in the early 1900’s. Our piping systems would fail inspection if piped without a flexible appliance connector, sized for that appliance, with the manufacturers label stating capacity attached. Other nuances of that code says the appliance connector must be in the same room as that appliance. Sediment traps (change in direction type, not liquid type) required at the appliance. CSST (like Gas tight) can not be used as an appliance connector unless specifically authorized by that manufacturer. Seeing installs from around the world and notice many differences that must be regional. Our water heaters are also required to have flex lines (different type) on the hot and cold lines also. For tankless types we generally have to use ~1” or larger appliance connector to meet the capacity requirements, we use the ones designed for hooking up an entire mobile home.
    There are two ways to do things, Right and Again.

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