The Haws model 9084 is an immersible cleansing stick that gives continual protection against pathogenic bacteria for water storage systems. It balances the PH of the water preventing the build-up of bio-film, scale and corrosion for up to 3 years with proper usage. This non-chemical disinfecting module is designed to be immersed in a water tank to provide constant protection from bio-film and hazardous levels of pathogenic bacteria, including Legionella. The Cleansing Stick will treat up to 528 gallons (2000 liters). Dimensions: 32" (81.3 cm) long x 3" (7.5 cm) in diameter.