How Long Does a Water Heater (conventional) Last?

Source: InterNACHI Life Expectancy Chart
6-12 years
Estimated lifespan
6 years
Minimum
12 years
Maximum

Estimated Replacement Cost

$1,200 – $2,500
installed | National average, 2025-2026

Extend Its Life

Flush the tank annually to remove sediment. Test the pressure relief valve yearly. Check the anode rod every 2-3 years and replace when depleted. Set temperature to 120F.

Category: Plumbing

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Lifespan estimates are based on industry data for typical residential installations with normal use and proper maintenance. Actual lifespan varies with installation quality, climate, usage intensity, and maintenance. These figures may differ from other sources.

Source: InterNACHI Standard Estimated Life Expectancy Chart for Homes

Page generated: 2026-03-29