Chlorine contact tanks are typically used with chlorine injection equipment in a well water system to help comply with strict drinking water standards. Chlorination is the most common disinfection method for public and private drinking water systems. This disinfection process is necessary to kill disease-causing bacteria in the water. To be sure that the added chlorine is killing the bacteria,the water is detained in the vessel for at least 30 minutes. Chlorine Contact Tanks are designed to the working pressure of the existing or new water distribution system. Sizing is based on the site restrictions, available pumping rate and a minimum required chlorine contact time.