The A-series family of unique thin-film reverse osmosis membrane elements are characterized by high flux and high sodium chloride rejection.

AK low pressure brackish water elements are selected when high rejection and low operating pressures are desired. These elements allow significant energy savings since good rejection is achieved at operating pressures as low as 689 kPa (100 psi.).

AG standard brackish water elements are selected when high rejection and operating pressures as low as 1379 kPa (200 psi.) are desired. These elements allow moderate energy savings and are considered a standard in the industry.