Product Description This is a replacement filter cartridge for theHydrotech Pura Quick-Change SystemFeatures:Purpose: Raise pH of water and removal of chlorine, taste and odorCapacity: 750 Gallons (2,835 l)Flow Rate: 0.5 gal/min (1.9l/min)Rated Life*: 6 to 12 MonthsStage: 4* The performance and life of a reverse osmosis membrane or filter element is highly dependent upon pressure, temperature and dissolved solids (TDS).The PURA Quick-Change pH booster cartridge will raise pH of water and removal of chlorine, taste and odor in your water. The innovative PURA twist and lock design makes service simple. Twist off the old cartridge and twist on the new. No messy sump removal. PURA makes drinking water better and life easier.The rated life of this cartridge is 6 to 12 months.Warning: This drinking water system is for use on potable water supplies only.  Source water exceeding chemical parameters requires pre-treatment**.Do not use with water that is  microbiologically unsafe or of unknown quality without adequate disinfection before or after the system.Turn off water supply to the head without cartridge if it must be left unattended for an extended period of time.  **Refer to inlet water condition guidelines in the user manualFor use as standalone or stage 4 Module in AquaFlo Platinum QCRO and QCUF systems.