The first-to-market Reverse Osmosis system with heating function. Waterdrop K6 water filter system integrates water purification and heating, meets various temperature demands and breaks through a conventional under sink RO water purification mode; it has a high capacity of 600 GPD (gallons per day) and a high hot water flow rate of 0.4 gal/min (gallons per minute), meeting your demands for water purification and hot water. | Waterdrop | | K6 Reverse Osmosis System Extra WD-ALK35 Water Filter | White | Best Buy