The system uses the pressure pump to increase the water supply pressure; the sand filter is used to remove plankton, moss, suspension, colloid etc. The active carbon filter is used to remove the strange smell, chlorine, chloride, organic matter and heavy mental, lower color and optimize water quality. Reverse osmosis is capable of removing 90-99% of total dissolved solids (TDS), 99% of organic, including pyrogens, and 99% bacterial in the feed water.