Activated carbon filter kit LAB0200AC, LAB0500AC, LAB1000AC, LAB1500AC is designed to remove free chlorine from tap water. This protects the reverse osmosis (RO) membrane against chlorine oxidation. Purification Technologies:  Suitable for: Order Information: Description Catalog No. 200 lph Activated carbon filter (Automatic Backwashing) LAB0200AC 500 lph Activated carbon filter (Automatic Backwashing) LAB0500AC 1000 lph Activated carbon filter (Automatic Backwashing) LAB1000AC