The Stealth RO™ 100/200 low pressure, cold water, high flow membrane is designed for people who have low water pressure and/or cold water. Low water pressure and cold water temperatures at the tap (45 PSI and lower) can decrease the flow of a reverse osmosis product water. Another benefit of the membrane is with standard pressures and temperatures (ie: 60 PSI and 70°F water), you can expect your RO flow rates to almost double!