A twenty-year-old traditional storage tank water heater should be replaced immediately, regardless of whether it is still currently producing hot water. Steel storage tanks possess a finite structural lifespan; operating a glass-lined tank for two decades pushes material fatigue far beyond standard engineering limits, making the inner shell extremely vulnerable to sudden, catastrophic ruptures and major household flooding. Proactively replacing an aging tank prevents emergency property damage and ensures your home benefits from modern energy efficiency improvements.
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