A high-rate sand filter is designed for flows in excess of how many gallons per minute per square foot?

A high-rate sand filter is designed to handle flow rates exceeding 5 gallons per minute per square foot of filter area. This filtration system is specifically engineered to operate efficiently at higher flow rates compared to standard sand filters, making them suitable for larger pools or commercial applications. The design allows for effective filtration while maintaining optimal water circulation and cleanliness.

Understanding this flow rate is essential for pool contractors, as it guides them in selecting the appropriate filter system based on the specific needs of the pool. Maintaining the correct flow rate ensures that the filter operates effectively, providing clear and clean water while preventing issues such as clogging or inefficient filtration that could arise if the filter is undersized for the intended application. This knowledge is also critical for adhering to industry standards and regulations regarding pool maintenance and water quality.