The 3M DP290 Cartpak is a filter replacement kit for the 3M DP290. It reduces cysts, bacteria, chlorine, sediment, and scale build-up. The DP290 Cartpak kit includes two HF90 cartridges and one HF8-S cartridge. These 3M filters have a combined flow rate of 5 gallons per minute and an operating capacity of 54,000 gallons. The HF90 replacement cartridges have a 0.2 micron rating and carbon block media for the reduction of chlorine taste and odor, sediment, cysts, and bacteria. The HF8-S cartridge provides scale inhibition.