A hot water heater exhibiting a structural leak caused by internal tank corrosion or rusted steel walls has reached the end of its lifespan and will fail completely. This type of active tank leak can worsen rapidly, lasting anywhere from a few hours to several days before resulting in a catastrophic rupture and severe indoor flooding. If the leak is instead coming from a loose external fitting, faulty T&P valve, or loose connection, it can be repaired and last for years. Verification: Inspect fittings and tank walls carefully to identify the leak origin.
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