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  • hydrogen gas buildup

    could someone explain how this can happen in a water heater and how it can be avoided

  • #2
    Re: hydrogen gas buildup

    I was told it is caused when an electric hot water tank is drained, but the power to the element has not been disconnected. The electricity reacts with the air (not sure if its air or carbon dioxide at this point) and becomes hydrogen gas.
    West Trail Mechanical Ltd
    Service. Commitment. Expertise.

    www.westtrailmechanical.ca

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    • #3
      Re: hydrogen gas buildup

      It can probably be avoided by shutting off the breaker to the HWT
      West Trail Mechanical Ltd
      Service. Commitment. Expertise.

      www.westtrailmechanical.ca

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      • #4
        Re: hydrogen gas buildup

        It happens on GAS or ELECTRIC water heaters

        that have not had water running though them for several weeks or months,
        because of reaction between water and the anode rod ! !

        JERRYMAC MASTERPLUMBER & PH.D IN WATER HEATEROLGY
        JERRYMAC
        E-MAILJERRYMAC777@GMAIL.COM
        CALIF. LIC. PLBG,HEAT,DRAINS,ELECTRIC,WATER HEATER, BOILER, POOL AND SPA HEATER
        FIRE SPRINKLER CONTRACTOR,
        SINCE JAN. 1989

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        • #5
          Re: hydrogen gas buildup

          You can't prevent it, the severity depends on your water. Hydrogen gas can be produce with the system in use, ever notice bursts of "air" when you run a tap?

          Quote "Your home's water chemistry may be such that it can react aggressively with metals, such as the anode in the water heater. This chemical reaction can create hydrogen gas. Only in extremely rare instances does this hydrogen gas pose a danger. It would take many months of the water heater being unused before the gas built up enough to reach dangerous levels. Other gases, such as oxygen, may occur naturally and be present in the water. When water is heated in a closed tank, its pressure increases. As the pressure increases the amount of gas that the water can hold in solution increases. When the hot-water faucet is opened, the water pressure decreases and the gas held in solution is liberated and forced out in spurts."
          You will never expand your mind, if you do not challenge your beliefs.

          By the reading of this post, you acknowledge and agree that the poster shall not be responsible or liable, directly or indirectly, for any damage or loss caused or alleged to be caused by or in connection with use of or reliance on any content contained herein.

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          • #6
            Re: hydrogen gas buildup

            mark/ toutahnow can give you an explanation of it first hand as he had a fireball from a pressure relief valve on a job inspection once.

            rick.
            phoebe it is

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