The answer to 'what causes water heater installation' is that there are several common reasons a homeowner may need to install a new water heater. The most frequent causes are an old, inefficient water heater that has reached the end of its lifespan, damage or leaks in the existing unit, or the need to upgrade to a larger or more energy-efficient model to meet the household's hot water demands.
Water heaters typically last 8-12 years, so if your current unit is over a decade old, it may be time to consider replacement. Corrosion, sediment buildup, and wear and tear can also cause leaks or other issues that require a full replacement. Additionally, if your family has grown or your hot water usage has increased, upgrading to a larger or more efficient water heater can provide better performance and lower energy bills.