Ensure clean and safe water for your household with the RS2DS OmniFilter Replacement Water Filter Cartridge. This model is built to filter virtually all types of sediment out of your water, while significantly reducing scale. Offered as a pack of two, this whole house water filter cartridge will fit into most industry standard 10" water filtration system casings. It works with both city and well water. This product features a string-wound construction, which vastly improves both its efficiency and sediment-holding capacity. The RS2 home water filtration cartridge is suited for OMNI's U25, OB1 and OB5 water filters, the OMNI Undersink OT32 and older R12, R14 models.