Additional Details ------------------------------ Product description: 3M AP-DW8090 Auqua-Pure Replacement Filter CartridgesThese filters are the replacement to the AP-DWS1000 drinking water system. The cartridges should be replaced every 625 gallons. The meter will shut down the system upon exhausting capacity. Simply change the cartridge set and reset the automatic meter. Conscientious cartridge change will insure the system will perform to it's NSF rated capabilities.3M AP-DW8090 Auqua-Pure Replacement Filter Cartridges Features: Flow rate .6 GPM Temperature range 40-100 degrees F Pressure range 20-100 psi Lead Reduction Taste/Odor Enhancement Chlorine Removal Cysts Removal Dirt/Sediment Filtration to .5 microns Manufactured from the highest quality NSF listed, FDA grade materials Sanitary "quick change" design allows for very easy cartridge change