How Long Does a Cast-Iron Bathtub Last?

Source: InterNACHI Life Expectancy Chart
70-100 years
Estimated lifespan
70 years
Minimum
100 years
Maximum

Estimated Replacement Cost

$2,000 – $7,000
installed | National average, 2025-2026

Extend Its Life

Clean with non-abrasive cleaners — harsh chemicals damage the enamel. Repair chips promptly with an enamel repair kit to prevent rusting. Refinish the enamel every 10-15 years.

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