Waterdrop Best Selling RO Systems Review Waterdrop is one of the leading brands within the water filtration industry. With its revolutionary tankless design, the brand gains its fame for the reverse osmosis collection. The RO systems from Waterdrop look nothing like the traditional RO systems. They are solid, sleek, and stylish. Composite Filter Technology The new composite filter technology employs an excellent filter combination to achieve more efficient filtration. The composite water filters can effectively reduce most contaminants. Composite Integrated Filters CF filter reduces rust, sediment, large particles, chlorine, taste and odor. MRO filter effectively reduces most contaminants, such as chloramine, antibiotics, organic matter, heavy metals, nitrite, bacteria, and limescale. This reverse osmosis water filter improves the taste of water and provides purified water that is as fresh as spring water. Reverse Osmosis Membrane The reverse osmosis membrane has a pore size of 0.0001 μm, which is one-millionth of a strand of hair. Bacteria and viruses are 5,000 times larger than its pore size. Therefore, only water molecules and some beneficial mineral ions can pass through the RO membrane. Heavy metals and other impurities are discharged from the waste water tubing. The G2 RO membrane can reduce most harmful substances in water. Innovative Tankless Design The tankless reverse osmosis system ensures the safety of your family's drinking water. This compact RO system also saves over 70% more under-sink storage space as compared to traditional reverse osmosis water filter systems. The tankless design avoids recontamination, such as bacterial growth.