Series PWROKCZRO patented ZeroWaste Point-of-Use Reverse Osmosis System is the first ever RO System that wastes no water. This highly efficient system provides better than bottled water quality for residential applications. The patented technology is 100% efficient -- no wasted water, so it saves as much as, 7000+ gallons per year in a typical residential application. Ideal for low pressure or well applications, the system produces up to 60 gallons per day of high-quality drinking water. Kwik-Change cartridges are the fastest changeable cartridges on the market. The 1/4-Pivot filter makes for ease of accessibility and filter change, reduces the amount of tube connections for greater reliability and fewer potential leaks. These proprietary cartridges connect to (and disconnect from) the unit by a simple 1/4 turn. The system features automatic shutoff -- no need to shut off incoming supply when changing filters. The space saving design installs under sink or in limited space. The system's Adapt-A-Valve easily connects to water source for 3/8 or 1/2. No faucet air gap or drain connection required. Comes with 3-gallon water storage holding tank and upgraded Watts top mount faucet (additional faucets and finishes available).Flow Rates: Up to 60 gallons per day (227 lpd)