What unit is commonly used to express flow rate in pools?

Gallons per minute is the commonly used unit for expressing flow rate in pools, particularly in the United States. This measurement indicates how many gallons of water pass through a specific point in the system, such as the pump or filtration system, in one minute. Understanding flow rate is crucial for proper pool maintenance, as it affects filtration, chemical distribution, and overall water circulation.

While liters per minute, cubic feet per hour, and milliliters per second are valid measurements in different contexts, they are less commonly used in pool operations. Gallons per minute provides a practical framework for professionals working in the pool industry, aligning with standard equipment specifications and maintenance protocols in the U.S.