Vevor Pool Cartridge Filter High Flow 21,000 GPH Cleaning System 725 sq. ft NewThis pool filter features a durable PP + fiberglass shell, ensuring durability and resistance to aging. With a seamless design and included connectors, it's leak proof and features a 50 micron filter element that handles up to 21,000 gallons per hour. A pressure gauge monitors the filter's status and releases excess air when needed to prevent bursts. This pool filter offers a filter area of up to 725 sq. ft, ideal for homes, hotels, and spas.