How is fluid flow rate for a pump or sprinkler system typically measured?

The fluid flow rate for a pump or sprinkler system is typically measured in gallons per minute (GPM) because this unit provides a clear and practical measure of how much water is being delivered by the system over a given period. In firefighting and sprinkler applications, GPM is particularly useful because it allows for quick assessments of the water supply's effectiveness and performance in emergency situations.

While liters per second is also a valid unit of measurement, it is less commonly used in the United States, which predominantly utilizes gallons in its fire protection standards. On the other hand, cubic feet per hour and barrels per day represent flow rates that are generally not suitable for assessing the immediate or high-volume water needs required in firefighting and sprinkler systems. GPM provides a standardized measure critical for understanding operational performance and ensuring compliance with fire safety regulations.