Applied Membranes reverse osmosis membranes are made in the USA.Minimum Salt Rejection:*96%Stabilized Salt Rejection:*98% *Salt Rejection for membrane shown is from internal test data. Note: Performance specifications based on 500 ppm tap water, 50 psi (0.35 MPa) applied pressure, 77°F (25°C) feed water temperature, feed water pH 7-8 and 15% recovery. Element permeate flow may vary ± 15%.RECOMMENDED OPERATION CONDITIONSMaximum operation pressure 125 psi (0.86 MPa)Maximum feed flow rate 2 gpmMaximum operating temperature 113° F (45° C)Maximum feed water turbidity 1 NTUMaximum feed water SDI (15min) 5Chlorine tolerance 0Feedwater pH range, Continuous Operation 2-11Feedwater pH range,Short-Term Cleaning (30min) 1-12Minimum brine flow to permeate flow ratio 4:1