What type of water supply is commonly used for fire protection systems?

The most commonly used water supply for fire protection systems is a potable water supply or a dedicated fire protection water supply. This is primarily because fire protection systems, such as sprinkler systems and standpipe systems, require reliable and high-quality water to effectively combat fires. A potable water supply meets the health and safety standards required for human consumption, ensuring that the water used in a fire emergency situation is clean and safe.

Dedicated fire protection water supplies are sometimes established specifically to ensure that sufficient water is available during a fire emergency without compromising the quality of water used for drinking or other essential services. This dedicated supply can include sources like fire tanks or reservoirs designed to provide ample flow and pressure when needed.

In contrast, while rainwater harvesting systems and recycled water systems can be utilized for a variety of applications, they typically do not meet the stringent health and safety requirements needed for fire protection. Groundwater wells may provide a water source, but they are less common as a primary supply due to variable quality and availability. Thus, the combination of reliability, safety, and meeting regulatory requirements makes potable or dedicated fire protection water supplies the preferred choice for fire protection systems.