A dosage pump is a small pump. It is designed to pump up the chemical to water, steam or gas. A dosage pump provides the flow rate of a chemical or some other substance by many different methods. Usually, the measured chemical amount is injected to a pump room and then this chemical volume is injected to an external pump or a tank. Dosage pumps have an important function in a pool operation as a part of the automatic disinfection systems. A dosage pump is usually fed by a small electric motor or a pnomatic actuator. These are controlled by an external control system or a pump controller. Poolline dosage pumps are the hearts of automatic disinfection systems. They are superior than the manual systems with their reliable structure. Their care is easy.