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        How To Install a Water-Heater Timer

        Save money on electric bills with a water-heater timer, which enables you to set specific on and off times for water-heater operation.

        More in Plumbing

        save on electric bills with water heater timer
        • Time

          2 hours

        • Price Range

          $50 - $100

        • Difficulty

          Moderate

        Highlights:

        Step 1: Remove the Timer from Casing

        This project works only with electric water heaters. Turn off the breaker that controls power to the water heater. Remove the timer from the casing (pictured), and remove the knockouts on the casing.

        remove timer from casing

        Step 2: Pick a Location

        Select a location for mounting the timer near the water heater, and use the casing as a template for marking the mounting holes. Drill pilot holes, and secure the casing to the wall with screws.

        Step 3: Remove the Power Cable

        Use a circuit tester to verify that the power to the water heater is shut off. Then remove the main power cable from the water heater (pictured) and route it through one of the knockout holes in the casing of the water-heater timer.

        remove main power cable

        Step 4: Connect New Wires

        Run a new cable (the same gauge as the old one) from the timer casing to the water heater. Strip about 1/2" of insulation from the wires, and connect them to the water heater. Return the timer to the casing (pictured).

        connect new wires

        Step 5: Complete the Project

        Strip 1/2" of insulation from each wire in the casing. Connect the ground wire to the ground plug on the timer. Shape the bare wire ends so that each fits under the appropriate lug. Tighten the screws to secure the wires to the timer (pictured). Set the timer by inserting clips at the appropriate time markers. Turn the power back on.

        tighten screws to secure wires to timer

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