... membrane, Hollow-fiber membrane 1. Stainless Steel Water Purifier --- SR-1000Center water filter uses Ultrafiltration membrane of independent patent right as its ... impurities such as bacteria, viruses, colloid and rust from water, turbidity are able to reach the national hygienic standard ... water in life. In addition, it boasts the advantage of long service life of 3 years or more. Whole Home Water ...