Description Classic 100 GPD RO/DI unit is designed to work with tap water that has been treated with Chloramines. Unlike Chlorine, which can be removed from water with a standard activated carbon block filter, Chloramines require a special filter cartridge. The Carbon Plus filter cartridge included in this model is rated to remove up to 98% of the Chloramines at 3 ppm and 0.5 GPM flow and treat 3,000 gallons of water. In addition, the Carbon Plus cartridge will remove up to 99% of standard Chlorine at 2 ppm and 0.5 GPM for up to 30,000 gallons of water. The RO/DI unit itself is comprised of a 5-micron sediment cartridge, 0.5 micron Carbon Plus cartridge, 100 GPD membrane and a refillable 10 inch color-changing deionization resin cartridge. Built into the unit is an Auto Shutoff Solenoid (ASO) and Flush Valve. The built-in liquid filled pressure gauge makes it easy to know when it’s time to replace the membrane. OPERATING REQUIREMENTS: Optimal water pressure: 40-65 PSI (if under 40 PSI a booster pump is required), Maximum water pressure: 80 PSI (if over 80 PSI a pressure regulator is required). Optimal water temperature: 77*F (25*C), Maximum water temperature: 105*F (40.5*C), Typical rejection rate: 1:3.5. 100 GPD Classic RODI System, Item 540706 Specifications Product Specifications: 100 GPD. Dimensions with bracket: 16.5" wide x 8.5" deep x 18" high. Weight 14 lbs. Minimum water pressure: 30 PSI. Suggested water pressure: 65 PSI • Maximum water pressure: 80 PSI - Optimal Water Temperature: 77°F (25°C). IMPORTANT INFO for New York City Residents Download the 100 GPD Instruction Manual HERE Download the Plumbing Diagram HERE Video