High-efficiency reverse osmosis membrane filtration, reverse osmosis membrane, pore size is only 0.0001 micron, equivalent to one millionth of a hair filament, a bacteria must be reduced by 4,000 times before it can pass, (boost pump is forced with a pressure of 20 kg pressure Reverse osmosis water filtration can effectively remove harmful substances such as bacteria, viruses, heavy metal ions and pesticide residues in water.