How Long Do Water Heaters Last? Replacement Signs
Water heaters are built for long service, but they don’t last forever. Typical lifespans depend on the type of unit, water quality, maintenance, and installation quality. Knowing how long your system should last—and what warning signs to watch for—can help you avoid unexpected failures and higher repair costs.
Average lifespan: what to expect
For most households, conventional tank water heaters usually last around 8–12 years. With better maintenance and favorable water conditions, some units may reach the upper end of that range or slightly beyond. Tankless water heaters often have longer stated service lives—commonly 15–20 years—though performance and longevity can vary based on how hard the unit is working and how well minerals are managed.
Signs your water heater may be near the end
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