HydroLogic® KDF/Catalytic Carbon Upgrade Filters are advanced carbon block pre-filters effective in capturing water-soluble metals, chlorine, chloramines and scale. The carbon media is more porous than coco carbon providing a wider range of filtration. Replacement should be performed when inlet pressure and outlet pressure difference is greater than 10%. NOTE: Systems come standard with HydroLogic® Green Coconut Carbon Filters. The HydroLogic® KDF/Catalytic Carbon Filters are an upgrade option.
 
For Stealth-RO™ and smallBoy® Systems
Replace every 2,000 Gallons for Stealth-RO Systems
Replace every 6,000 Gallons for smallBoy® Systems
Dimensions: 10.5in x 4.5in