HR3–Series Reverse Osmosis Membrane Elements offer the highest salt rejection rates at 99.5% and up to 2,200 gallons per day. Protected with a hard ABS shell, HR3–Series RO Membranes continue to be a top choice amongst equipment operators for high salinity applications. With an operating pressure of 225 psi, HR3–Series RO. Membranes are ideal for municipal water or deionization feed applications. Benefits: Superior Quality and Cost Savings Individually Inspected, Qualified and Vacuum Tested All Industry Standard Sizes High Rejection of Salts Improved RO System Performance