Water Heater System Guide
Understand your water heater system, how long it lasts, when to plan replacement, and how to maintain it efficiently.
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Quick answer
Water heaters typically last 8-12 years for tank systems and 15-20 years for tankless. Regular maintenance extends lifespan and prevents leaks.
- Tank water heaters last 8-12 years on average.
- Tankless systems can last 15-20 years with proper maintenance.
- Annual flushing and inspection prevent leaks and extend life.
Last updated Jan 24, 2026 · Reviewed by Keptera Editorial Team on Jan 24, 2026