You should generally plan to replace a traditional residential storage tank water heater every ten to twelve years, even if it is still functioning, because aging steel tanks become increasingly vulnerable to sudden structural ruptures and major leaks. Tankless water heaters and commercial-grade units can last significantly longer, often pushing twenty to twenty-five years before needing replacement. Proactively replacing a traditional tank after a decade protects your home from catastrophic water damage and avoids unexpected emergency plumbing expenses during sudden failures.
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