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.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 TW30-4021 36 (3.3) 900 (3.4) 99.5 Permeate flow rate and salt rejection based on the following test conditions: 2000 ppm NaCl, 225 psi (15.5 bar), 77°F (25°C), 8% recovery. Permeate flows for individual elements may vary +/-20%. For the purpose of improvement, specifications may be updated periodically.