1)Diagram of Water Flow Sediment Filter Pre-treatment Sediment Filter maximized the effect of purification from the initial stage by eliminating minute impurities with the size down to 1 μm such as rust, soil, sand and dust. Pre-Carbon Filter Pre-Carbon Filter that used absorption method of carbon makes water, which is close to natural water by absorption and elimination of organic chemicals such as chlorine ingredient (tri-halo-methane) and smell as well. Post-Carbon Filter Post Carbon Filter makes clean water without color and taste by preventing the propagation of bacteria and eliminating unpleasant smell, taste and pigments permeated in water. Nano silver Membrane Filter This Nano silver filter is equipped with a special kind of plain film having 95% pores regularly made on it. Its pore in size of 0.05~0.09㎛ can endure the water pressure of 20kg, blocking the in-flow of the various germs.