The answer to 'how long does water heater installation last' is that a properly installed and maintained water heater can typically last 8-12 years. The lifespan of a water heater depends on factors like the quality of the unit, the water quality in your home, and how well it's maintained through regular flushing and inspection.
Most manufacturers recommend replacing your water heater every 8-12 years, though some high-quality models can last up to 15 years with proper care. Regular maintenance like flushing the tank and inspecting the anode rod can help extend the lifespan of your water heater. If you notice any leaks, unusual noises, or a drop in hot water supply, it may be time to consider replacing your water heater.