The iSpring RCS5T is a high capacity tankless reverse osmosis purification system. The RCS5T's high-efficient RO membrane produces RO water at a rate of 500 gallons per day while delivering a top-of-the-line 1.5:1 pure to drain ratio. The system removes chlorine, hardness, heavy metals, toxins, and a long list of other water impurities. The on demand output ability makes the RCS5T a great choice for large families or light commercial use in small restaurants, beauty salons, offices, coffee Shops, or any small business. Why iSpring? Located in Alpharetta, Georgia for over a decade, iSpring Water Systems LLC is a family owned company specializing in reverse osmosis water filtration systems. Our products include residential and commercial Reverse Osmosis (RO) systems, whole house water systems, ultra-filtration systems, shower, faucet, and counter top filters, filter cartridges and housings, RO coolers, and kitchen faucets and fittings. Our aim is to make high quality drinking water accessible for all households. With affordable pricing, solid quality, prompt delivery, and top notch customer service, we hope to assist in bringing you great water for years to come. Incoming Water Pressure: 40 PSI - 70 PSI Operating water temperature range: 40 – 100 °F Maximum TDS: 750 ppm Membrane Filter Life: 2-3 years at 3 Gallons/day or 2600 Gallons Note: All flow rates stated on our reverse osmosis systems and membranes are assuming a water temperature of 77°F. Water temperature changes will affect the flow rate. For every degree F the temperature lowers, about 3% of product flow is lost. For every degree F the temperature increases, about 3% product flow rate is gained. This occurs because water with a higher temperature has a lower viscosity and higher diffusion rate, which makes it easier for the water to permeate the RO membrane. Lower feed water temperatures during the winter season will result in a decrease in flow rate.