We can supply 4 or 5 stage RO system both for household and commercial use, as well as tank, faucet, LCD display, manual flusher and other related parts. All the parts are imported or provided by domestic famous suppliers, The mebrane is from USA or Korea. The system works stably and has a long service life. Stage one: PP sediment, micro rate can be 1, 5, 10um. Stage two:activated carbon block(CTO), good ability in removing Chlorine, odor and color. Stage three:Granular Activated Carbon filter cartridge, is good at removing odor, color, objectionable tastes, Chlorine, spore, lead and microorgaisms. Stage four: Reverse Osmosis membrane form USA or Korea, the size of pore can be from 0.0001 to 0.001um. Stage 5:In-line filter filled with Coconut shell Actibated Carbon Tianjin Jinghai Yunda Industry and Trade Co.,Ltd. (YUNDA FILTER CO.) is a professional and vigorous enterprise specialized in manufacturing and designing all kinds of water purification elements such as water filter cartridges, housings, household and commercial water filter systems and all related spare parts. All the products meet international specifications. The products apply to the fields of water treatment, beverage-making, electroplating, organic solvent recovery, precious metals recovery, etc.