Water purification effect: effectively remove scale, sediment, organic matter, dirt, chemical-residues The water is deeply purified by, using PP-cotton, pre-compressed activated-carbon, RO-membrane, and post ultrafiltration activated-carbon 4 filter layer The filtered water can be directly drunk , be sure to check your use and maintenance guide before installing, slide the new filter into the housing and push it until it locks in place It is recommended to replace the water filter every 6 months to the highest water Built-in active-carbon filter layer, with good filtering effect, makes the air in the refrigerator freshs The pores are developed and have strong adsorption capacity It can effectively remove residual chlorine and in water