This Neo-Pure RO water filter replacement kit provides a complete one year supply of water filters for your RO Pure RO-4 system. This kit includes sediment and carbon prefilters, a, carbon postfilter, and an RO membrane. The filters feature high-quality media to 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 reverse osmosis.
The Neo-Pure RO system has four stages. At each stage, your water passes through a water filter. This replacement filter kit includes all the filters your reverse osmosis system needs for a year.

(2) Neo-Pure Sediment Prefilter for Watts Premier RO Pure 105311: Trap sediment and other particles such as dirt, silt, and rust for better looking and tasting drinking water. Change the sediment filter every 6 months.

(2) Neo-Pure RO-Pure Carbon Pre-Filter Replacement For Watts Premier 105351: Active carbon removes chlorine, enhances taste, and conditions water to prepare it for RO treatment. Change the carbon filter every 6 months.

(1) Neo-Pure RO-Pure GAC Carbon Post Filter Replacement For Watts Premier 105341: Granular activated carbon (GAC) further enhances flavor of water while conditioning and reducing chlorine. Change the GAC filter every 12 months.   
(1) Neo-Pure RO-Pure Membrane Filter 50 gpd Replaces Watts Premier 105331: The reverse osmosis membrane effectively reduces arsenic, lead, nitrates, perchlorate, chromium, copper, dissolved solids and cysts. Change the RO membrane every 12 months. Changing the filters takes just a few simple steps: To remove the filter, lift it, press the button to unlock the filter, and pull it out. To insert the new filter, remove its cap and push it in place.

PRODUCT NOTE: These filters will NOT fit the WQC4RO11-50 50 GPD Watts 1/4 turn Kwik Change RO System, or the WQC4RO13-100 100 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.