... No power or pressure Water purifier, UF membrane, Hollow-fiber membrane 1. Stainless Steel Water Purifier --- SR-2000ACenter water filter uses Ultrafiltration membrane ... as bacteria, viruses, colloid and rust from water, turbidity are able to reach the national hygienic standard of bottled ... . Furthermore, it is of large water flux, able to meet the demands for purified water in life. In addition, it ...