Locate the drain valve at the base of the water heater and attach a garden hose to this valve with a set of channel locks. Attach a Garden Hose to the Drain Valve.Turning the thermostat to the lowest setting will ensure that the water heater is not heating. The natural gas or propane supply valves do not need to be turned off during this process. Just keep in mind that you will need to work with a flashlight or work lamp because the electricity will be off for the entire home. If you don't know which fuse is assigned to the water heater, you can turn off the power to the entire home by either turning off the main switch, or if there isn't a lever, removing the main fuse for the home. If you don't know which branch breaker is assigned to the water heater, then you will need to turn off the main switch to shut down power to the entire home.įor fuse boxes, you will need to remove the fuse that is assigned to the water heater. Locate the branch breaker in the breaker box that is assigned to the water heater and turn it off. If you have an electric water heater, then you will need to turn off the electricity from the breaker box or fuse box. Make a note of what the temperature setting is, then turn the thermostat to the lowest setting, which should be marked as 'Pilot'. It typically has a red knob and is located where the gas pipe enters the unit. If you have a gas water heater, then look for a thermostat on the outside of the water heater. Before flushing the water heater, you need to turn off the fuel source to avoid damaging the water heater. The purpose of a water heat is to heat a large quantity of water using either gas or electricity as a fuel source. The Spruce Home Improvement Review Board.
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