CBS PPH Salt-Free Anti-Scale System with Dual Carbon FiltrationTransforms ordinary tap water into filtered, healthy spring like water throughout your entire home. Filters sediment, chlorine, FPAS, and other disinfection by products. Protects appliances and plumbing from harmful hardness build up. Large Capacity 4. 5" x 20" Filter Cartridges. Replacements PPH Cartridge Carbon Block Cartridge. Carbon Cartridge Certifications (system comes with 2 pcs). Filter Housing with Patented Microban Technology. Compact, space