The model 9083 HawsCLEAN cleansing stick is the safe and effective way to prevent the growth of Legionella, E-Coli and other harmful bacteria in most portable gravity fed or pressurized emergency eyewash equipment. Simple to install and maintain, the HawsCLEAN cleansing stick is non-chemical, non-powered, environmentally friendly and cost effective. Provides clean water and ANSI compliance in equipment up to 15 gallons (60 L) for up to three years when serviced just once annually. Simply immerse the stick in the tank and the process of protection starts immediately.