DetailsOMNIFILTER 1100R Quick Change Water Filter Cartridge Replacement. Fits OmniFilter R1100 and CBF2 System. Also fits Culligan quick change systems that use the 1000R replacement water filter cartridge, the SY-1000, IC-1000, RV-1000, IC-750, SY-750 and RV-750 drinking water systems. Also fits Pentek QC-10 systems and all systems that use the Pentek QCH water filter head. Reduces sediment, chlorine, odor, lead, cysts, lindane, atrazine and improves taste.