The Omnipure E5528 RO Prefilter is a replacement filter body engineered with a universal cap designed to affix to existing permanent heads. The new E-Series was designed for our customers that are using existing permanent heads but would like an alternative to the replacement bodies offered. The main benefit of the E-Series is price-to-performance value. The Omnipure E5528 features a friction welded cap, multiple o-rings for a weepless connection, durable polypropylene body and high grade filtration media. The Omnipure E5528 Water Filter is ideal for use in commercial beverage and food service applications. The Omnipure E5528 GAC water filter is a granular activated carbon filter used to reduce taste, odor and chlorine.