Genuine Manufacturer Replacement: The Axeon HF4-2521 RO Membrane is an authentic, high-quality replacement membrane designed to fit the Axeon AT-1000, AT-500, HT-1000, HT-500, and L1-300 commercial reverse osmosis systems High Rejection Rate: Manufactured using the industry's leading membrane film technology, the HF4-2521 effectively removes up to 99% of contaminants for commercial applications. High Flow Performance – The thin-film membrane (TFM) delivers a flow rate of 400 gallons per day, providing reliable and efficient water treatment. Extra Low Energy – By operating at low applied pressures, the membrane provides increased production, high rejection rates, and low energy consumption. Long Life Benefits – Under normal operatng conditions, the hf42521 need only be replaced every 24 months. Note that the presence of free chlorine, chloramines and other oxidizing agents can cause premature membrane failure Axeon's HF4-2521 RO membrane delivers high-flow performance with a 400 GPD thin-film membrane (TFM), ensuring reliable and efficient water purification for commercial applications. Designed for brackish water treatment, it operates at extra low energy while maintaining high flow capacity at low applied pressures, reducing overall energy consumption. Used in the BT-1500, BT-2000, HT-1500, and HT-2000 RO systems, it provides seamless integration and consistent results. Measuring 21 x 2.4 inches, this durable membrane is built for long-term performance. All membranes are shipped dry for indefinite shelf life, 100% vacuum integrity tested, and available as individually wet tested. For optimal water quality and system efficiency, replace every 24 months to prevent buildup and maintain peak performance.