How Long Do Water Heaters Last?

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One of the most common questions we receive at KC Water Heaters is about the lifespan of water heaters. Thanks to our extensive tracking through the Water Heater Database ( over five years, we’ve gathered insightful data on this topic. Most of the data was unfortunately lost.

Average Lifespan of a Water Heater

Considering about 4000 tanks replaced, the average lifespan for a Water Heater in the Kansas City area is 15-18 years. However, this number can vary widely. Some units impressively last up to 30 years or more, while others might not even reach the decade mark.

Factors Influencing Lifespan

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  • Installation Quality: A significant determinant. Many water heaters that failed before reaching 10 years suffered from installation issues, flexible water heater connectors, or fittings that should have been replaced during the installation. Also not addressing too much water pressure or proper calibration and prevention of thermal expansion. Improper drafting can also cause premature failure.
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  • Water Quality: Hard water deposits like Calcium and Magnesium can actually help protect the water heater. Installing a Water Softener can actually remove these minerals which will cause the anode rod of the water heater to dissipate much more quickly. Other areas with water quality issues may also wear through the anode rod much more quickly.
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  • Water Pressure: High water pressure and thermal expansion can cause premature failure of the tank and frequent discharge from the T&P Valve.

Improving Your Water Heater’s Lifespan

At KC Water Heaters, we don’t just replace and install water heaters; we also focus on ensuring they last as long as possible. Proper installation and quality materials are important factors.


The lifespan of a water heater can vary greatly, but with the right installation , it’s possible to extend it significantly. By understanding the factors that affect longevity, you can make informed decisions about your water heater and enjoy reliable hot water for years to come.

For expert advice and installation, reach out to KC Water Heaters. Let us help you get the most out of your water heater.