Replacement kit for Watts WP-4V Manifold RO System This kit contains: 5 Micron Sediment: Reduces Dirt, Sand and Rust. 5 MicronﾠCarbon Block: Reduces Chlorine, Objectionable Tastes and Odor. 0.5 Micron VOC Carbon Block: Reduces harmful VOC's Specifications: The recommended filter change is every six months.ﾠ The final filter is once per year*. *Note: Filter life may vary based upon local water conditions or use patterns. Filters are for the system pictured below: ﾠ