The Pentek QC10-CBRR fits the following water filtration systems: Culligan SY-1000 Culligan RV-1000 Culligan IC-1000 All Pentek QC10 Quick-Change Systems American Plumber DW600 filtration systems The Pentek QC10-CBRR is Pentek verision of the Culligan 1000R Replacement Filter. The QC10-CBRR filters more contaminants than the QC10-GACR and is NSF Certified. Part number 155785-43. The Pentek QC10-CBRR reduces: Chlorine taste & odor Lead Atrazine Cryptosporidium Giardia cysts Sediment The Pentek QC10-CBRR, 155785 Specifications: Capacity: 500 Gallons Flow Rate: 0.5 GPM .5 Micron Rating Great For Ice Makers, Coffee Makers, and other residential and industrial applications The QC10CBRR will fit in the Culligan SY-1000, RV-1000, IC-1000, all Pentek QC10 Quick-Change Systems, and American Plumber DW600 filtration systems. Cartridge needs to be replaced every 6 months.