How Long Does a Water Heater Last? (And When To Replace It)

Most water heaters last 8-12 years. Learn the lifespan of each type and the signs it's time to plan a replacement.

Most tank water heaters last 8 to 12 years; tankless units often run 15 to 20 with maintenance.

Hard water is the biggest enemy — sediment makes the burner or element work harder. Flushing the tank yearly and replacing a worn anode rod adds years.

If yours is past 10 years and showing rust-colored water, noises, or weeping at the base, plan a replacement before it fails on its own schedule.

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