Camcos TastePURE RV/Marine Water Filter reduces bad taste, odor, chlorine and sediment in drinking water with a 20-micron sediment filter. Also features GAC (Granular Activated Carbon) filtration in combination with KDF to prevent undesirable bacteria growth when the filter is not is use. Durable in-line, exterior mount filter has a wide body for increased flow. Four filters included. Not designed or tested with fish tanks or ponds. NSF/ANSI 42 and NSF/ANSI 53 listed. CSA lead-free content certified to NSF/ANSI 372 and compliant with all federal and state level lead-free laws. Made in the USA. Safe Water Matters: GAC (Granular Activated Carbon) filtration greatly reduces bad taste, odor, chlorine, and sediment; Large Capacity Filtration: Each large capacity in line water filter lasts an average of 3 monthsCompliant with all Federal and State Level Lead-Free Laws: CSA lead-free content certified to NSF/ANSI 372 and compliant with all federal and state level lead-free laws. Product is made in the USA. Protects Against Bacteria: Premium KDF provides protection against bacteria growth while filter is stored or not in use Great for RVs, boats, campers, pets, gardening, & much more When first attaching the filter to your water source, allow the water to run free for a few minutes to flush the initial loose carbon out of the filter. When the water runs clear, the filter is ready for use! | Camco TastePURE KDF/Carbon Water Filter, 4-Pack Made in USA