What is the lifespan of an electric water heater?

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Accepted Answer

An electric water heater normally lasts 10 - 15 years - how long it actually runs depends on how often it is used, on the chemistry of the water and on whether it is serviced. Once a year the tank should be drained to flush out sediment, the heating element has to be changed when it fails and the anode rod has to be swapped for a new one before it is eaten away. If the water is hard or if routine service is ignored, the unit will usually fail after only eight to ten years - in soft water with careful upkeep it sometimes passes the fifteen year mark. Water that runs hot plus cold and rust on the outside of the tank all warn that the heater is close to failure. A new anode rod every few years can put off the day when the whole heater must be scrapped. Attending to those few tasks and checking the unit from time to time will give the longest, most trouble free life an electric heater is able to deliver.

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