Watts-W-4040-LE Membrane for Commercial Reverse Osmosis Systems, 4 IN x 40 IN, Tape Wrapped, Low Energy, 2200 GPDWatts Commercial RO Membrane 4" x 40" Low Energy Thin Film Membrane for High Volume Commercial Systems The Watts W 4040 LE delivers 2200 gallons per day at lower operating pressure, reducing energy costs while maintaining consistent water quality in commercial reverse osmosis installations. 2200 GPD 125 PSI Max Low Energy Tape Wrapped WHY IT WORKS Engineered for efficiency in commercial environments Low Energy Design Operates at lower pressure than