Watts Inline Water Filter 20,000 gallon Capacity- Inline Filter for refrigerator, Ice Maker, Under Sink, and Reduces Bad Taste, Odors, Chlorine and Sediment in Drinking Water Great for Refrigerators, Ice-makers, RV, Campers, Boats, Water fountains, Water coolers, Commercial coffee makers USES KDF FOR FILTERATION: Uses Kinetic Degradation Fluxion - treatment for water filtration INLINE CARTRIDGE: comes with 10 inch KDF Inline Filter and 1/4 inch brass connectors (QTY 2) EASY TO INSTALL: This unique product connects easily to existing plumbing. Maintenance Free, Inspect at least every six months Works with all water supply using 1/4 inch lines CERTIFICATIONS: NSF Certified for 20,000 gallons. WQA certified for bacteriostatic properties to guarantee extended filtration life Reduces chlorine, odor, contaminants, sediment, and particulates for better taste and healthier drinking water. Lasts up or 20,000 Gallons