Step 1 · Safety First: Shut Off Power and Gas Supply
Before any work begins, you must ensure the water heater is de-energized. For an electric water heater, locate its corresponding double-pole breaker in your main electrical panel and switch it to the 'OFF' position. For a gas water heater, find the gas shut-off valve on the gas line leading to the unit's controller. The valve handle should be turned 90 degrees so it is perpendicular to the gas pipe, cutting off the supply. Also, turn the gas control knob on the heater to the 'OFF' position.
Tools and Materials
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