DOW Filmtec BW30-400 RO Membrane 10500 GPD, an 8" x 40" high productivity brackish water Reverse Osmosis Membrane that can provide RO quality water up to 10,500 gallons per day at a 15% recovery rate. It can operate at feed pressures ranging from 225 psi to 600 psi with 99.5% salt rejection. This element offers the highest quality water for large-scale industrial and municipal water treatment systems purifying greater than approximately 10 gpm (2300 L/h) of RO water and is the industry standard for reliable operation and production of the highest quality water in commercial applications. It was the first 400 square foot membrane elements on the market and continues to be widely used in new equipment and retrofits where system capital and productivity are factors.