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  1. #1
    Al Miha's Avatar
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    Default Tankless DV Water Heater Gas Connection

    I know codes are different for county to county but generally speaking, would a 20 ft flex gas pipe would be allowed for connection of a tankless water heater?

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    Last edited by Al Miha; 11-17-2009 at 04:34 PM.
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  2. #2
    Join Date
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    Default Re: Tankless DV Water Heater Gas Connection

    Quote Originally Posted by Al Miha View Post
    I know codes are different for county to county but generally speaking, would a 20 ft flex gas pipe would be allowed for connection of a thankless water heater?
    Sounds like CSST, as opposed to flex connector. If CSST, 20' shouldn't be a problem, in and of itself.

    "There is no exception to the rule that every rule has an exception." -James Thurber, writer and cartoonist (1894-1961)
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  3. #3
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    Default Re: Tankless DV Water Heater Gas Connection

    I have never seen a 20 ft flex gas line, or a thankless water heater.
    I have seen a few indifferent ones though.


  4. #4
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    Default Re: Tankless DV Water Heater Gas Connection

    A "thankless water heater"!! I've never see a "thankless" water heater. Then again I've never seen a thankful water heater either.

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  5. #5
    Tony Watson's Avatar
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    Default Re: Tankless DV Water Heater Gas Connection

    Would need to know the manufacturer of the csst (of course most are close in how much gas they will allow to pass) to determine, also the BTUs of the tankless (normally around 199,000 ) but some are more and some are a little less.

    20' will only supply an aprox 175,000 BTU appliance, with gas pressure in ounces.

    Is it an elevated gas system with a regulator at the unit, then 3/4 should be fine.

    Last edited by Tony Watson; 11-18-2009 at 04:42 AM. Reason: Left something off

  6. #6
    Dennis Krouse's Avatar
    Dennis Krouse Guest

    Default Re: Tankless DV Water Heater Gas Connection

    You will need to know what size the line is and at what pressure its at and if it is natural or propane to make a determination. Maximum btu rating of the appliance will also need to be found out.


  7. #7
    Al Miha's Avatar
    Al Miha Guest

    Default Re: Tankless DV Water Heater Gas Connection

    Sorry I should have posted that.
    Is a 7.4 gpm, 199000 btu that requires a 3/4 natural gas connector.


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