The volume of water going through a filter system is measured in which unit?

The volume of water going through a filter system is measured in gallons per minute, which is the standard unit used in the pool and water treatment industry to quantify flow rates. This measurement indicates how many gallons of water pass through the filter system in one minute, providing essential information for maintaining proper water circulation and ensuring the effectiveness of the filtration process.

Using gallons per minute allows pool operators to assess whether the filtration system is operating within its designed capacity, which is crucial for maintaining water quality, clarity, and hygiene. Different systems may have specific flow rate requirements, and understanding this flow rate helps identify any issue with the filter or the overall system that could lead to inadequate filtration.

The other options, while they reflect units of measurement, do not accurately account for water volume flowing specifically through a filter in the context used here.