The Omnipure E5685 is an All Phosphate Scale Inhibitor water filter. The Omnipure E5685 is a replacement filter body engineered with a universal cap designed to affix to existing permanent heads. The new E-Series was designed for 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 E5685 features a friction welded cap, multiple o-rings for a weepless connection, durable polypropylene body and high grade filtration media. The Omnipure E5685 Water Filter is ideal for use in commercial beverage and food service applications. The Omnipure E5685 pHosphate scale inhibitor water filter is used to reduce scale and prevent scale buildup in your pipes and on your fixtures.