How Long Should a Water Heater Really Last?

Homeowners often assume their water heater will “just keep working” until it fails. In reality, the question isn’t only how long a unit can last—it’s how long it typically does in the real world, and what warning signs mean you should prepare sooner.

On average, conventional tank-style water heaters tend to last about 8 to 12 years. With proper maintenance and favorable conditions, some can run longer; heavy use, poor water quality, and lack of service can shorten that timeline.