FILMTEC reverse osmosis (RO) elements offer the highest quality water for small commercial systems purifying less than one gallon per minute (0.2 m3/d) of RO water.FILMTEC membranes are available in a variety of sizes to meet a wide range of space requirements.FILMTEC XLE extra low energy elements operate at the lowest pressure in the industry, resulting in lower energy costs and enabling system builders to use lower cost components.In addition to the highest quality water and the lowest energy costs, FILMTEC membranes also deliver savings by providing the industry's longest lasting and most reliable performance. Product Name Nominal Active Surface Areaft2 (m2) Permeate Flow Rategpd (m3/d) Stabilized Salt Rejection(%) FILMTEC XLE-4021 36 (3.3) 1025 (3.9) 99.0 Permeate flow rate and salt rejection based on the following test conditions: 500 ppm NaCl, 100 psig (6.9 bar), 77°F (25°C), and 8% recovery. Permeate flow rates for individual elements may vary +/-20%. For the purpose of improvement, specifications may be updated periodically.