ECO

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    • #278045
      MasterPlumbers
      Keymaster

      What does ECO stand for, what does an ECO do and how does it do it? Can anyone answer those questions please?

    • #297569
      Art_xyz
      Participant

      ECO stands for emergency cut-off. It is a fusible link (one time use). If your water heater thermostat goes bad and doesn’t shut off, the ECO will melt and cut off the milivoltage to the gas valve and it will shut off.

    • #297570
      Guest
      Participant

      Thank you Art for your help.

    • #297571
      hj
      Participant

      to be more precise, it stands for Energy Cut Off and electric water heaters also have them, except they are resettable by depressing the red button. Their function in both gas and electric heaters is to disable the heating source if the thermostats fail to function properly. They are an imperfect second line of defense, since the temperature/pressure relief valve should operate before the ECO and make it unnecessary.

    • #297572
      Guest
      Participant

      Thank you also, HJ

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