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Reverse osmosis water system does not add activated carbon filter on the front? Because activated carbon is a kind of multi-Pore Charcoal,There is a very rich pore structure,Good adsorption properties,Its adsorption is formed by the absorption force of physics and chemistry.The pore size of activated carbon is generally divided into three categories: Large hole: 1000-Transition hole: 20-1000A micro-pores: 20 A \ r is mainly to filter out the impurities of large molecules after the raw water is filtered through multiple media,So as to ensure the service life of activated carbon.\ R if you can ensure that the water quality of the inlet water can meet the requirements of activated carbon, you can not use multiple media filters!