Yes, you should flush your water heater after 10 years, but only if the tank is structurally sound and free of internal rust leaks. By the 10-year mark, traditional storage tank water heaters have accumulated substantial calcium and mineral sediment at the bottom of the tank, reducing heating efficiency. However, because 10 years represents the outer edge of a standard water heater's lifespan, inspect the tank carefully for structural corrosion before performing maintenance. Verification: Attach a garden hose to the bottom drain valve to clear out sediment and check water clarity.
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