Chlorine dosing systems are simplest and most widely used disinfection system, worldwide. Chlorine is simple to dose, cost-effective and very efficient as a disinfectant. Diaphragm pumps are commonly used for application of chlorine to treat waters. In addition, plungers and some other types of pumps are also used to dose chlorine. Some times chlorine tanks are also to keep the water in contact for a longer period of time. Dosing can be done using liquid or gaseous chlorine as per the requirement.