We designed the 3M Aqua-Pure Under Sink Dedicated Faucet Replacement Water Filter Cartridge AP-DW80/90 for the AP-DWS1000 and AP-DWS1000 LF filtration systems. It is NSF certified to reduce particulate, chlorine taste and odor, lead, turbidity, parasitic protozoan cysts, VOCs and MTBE and deliver cleaner, clearer, better tasting water through a dedicated faucet (included in the AP-DWS1000).