Viewing 4 reply threads
  • Author
    • #278045
      Avatar photoMasterPlumbers

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

      • #297569
        Avatar photoArt_xyz

          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
          Avatar photoGuest

            Thank you Art for your help.

          • #297571
            Avatar photohj

              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
              Avatar photoGuest

                Thank you also, HJ

            Viewing 4 reply threads
            • You must be logged in to reply to this topic.

            Pin It on Pinterest

            Share This