The WOW water-on-water reverse osmosis system, with its unique patented technology, sleek design and compact size is the most versatile, efficient and hassle-free POU (point of use) RO system on the market today. This Water-On-Water reverse osmosis water filtration system has one of the most unique and sleek designs on the market. The system uses 3 stages to clean and enhance your water and it is fairly easy to set up compared to other products. Although the gallons per day of this system are not very high, it will work efficiently. The good efficiency of this water filtration device makes it one of the best on the market when it comes to not wasting water. The plastic components of this WOW Water system are all made with cutting-edge injection molding technology. this a good material for the product because it cannot rust like some other products. WOW Features: Small foot print Quick recovery time Expandable for increased water usage. Water saving - Waste water efficiency Great on low pressure applications [20 psi] (Faucet not included)