What is the maximum filtration rate per square foot for pleated cartridge filters in public swimming pools?

For pleated cartridge filters in public swimming pools, the maximum filtration rate is established to maintain effective water clarity and sanitation while preventing excessive wear or damage to the filter media. The correct value of 0.375 gallons per minute (gpm) per square foot maximizes efficiency while ensuring that the filter can adequately process the water without leading to a rapid buildup of debris or a decrease in flow rate.

This maximum rate is particularly relevant because exceeding it can compromise the performance of the cartridge, potentially leading to higher maintenance costs and reduced operational lifespans for the filters. The design and materials used in pleated cartridge filters are engineered to manage this specific rate effectively, allowing for optimal filtration without risking filter failure or water quality issues.

Understanding this value is crucial for pool contractors, as it influences system design and maintenance practices, ensuring compliance with health and safety regulations for public swimming facilities.