The answer to 'when to replace water heater installation' is that you should typically replace your water heater every 8-12 years, or sooner if you notice signs of wear and tear. Water heaters are essential appliances that provide hot water for your home, but they have a limited lifespan and will eventually need to be replaced.
Several factors can impact the lifespan of a water heater, including the type of water heater, the quality of the installation, and the mineral content of your local water supply. Regular maintenance, such as flushing the tank and inspecting the anode rod, can help extend the life of your water heater. However, even with proper care, most water heaters will need to be replaced within 10-15 years.