DentaPure 365 Day Bottle - Install by connecting to your existing Bottle System. (quick-connect fitting included.) No Water Quality Testing or Line Flushing Required for the Life of the Unit which is at least 365 days, or Until I2 levels fall below .5 ppm. No Line or Bottle Buildup. Elutes 2-6 ppm of non-allergenic I2 iodine and provides cfu levels of less than 200. EPA Registered Anti-Microbial Waterline Product. Meets or Exceeds All Clinical Water Quality Recommendations.