The Watts Premier RO Pure Replacement Prefilter and Postfilter Kit provides a complete one year supply of filters for your RO Pure RO-4 Reverse Osmosis System. This kit includes the Sediment and Carbon Prefilters, and the Carbon Postfilter. The filters feature high-quality media which will reduce sediment, dirt, rust silt, chlorine, tastes, and odors from your drinking water. They also prepare your water for the reverse osmosis process, and condition it before and after it goes through the RO System.

(2) Sediment 105311 Prefilters. Traps sediment and other particles such as dirt, silt, and rust for better looking and tasting water. Change every 6 months.

(2) Carbon 105351 Prefilters. Active carbon removes chlorine and enhances taste. Also conditions water to prepare it for RO treatment. Change every 6 months.

(1) GAC Carbon 105341 Postfilter. Granular activated carbon (GAC) further enhances flavor of water, while reducing chlorine and conditioning. Change every 12 months.

PRODUCT NOTE: These filters will NOT fit the WQCRO11-50 50 GPD Watts 1/4 turn Kwik Change RO System, or the WQRO13-100 100 GPD Watts 1/4 turn Kwik Change RO System. If you have one of these systems, please navigate to the system pages by following the hyperlinks.