Chemical Dosing System Capacity 20 LPH Chemical dosing system is designed to automatically inject chemicals into the chemical feed tank for wastewater treatment. During the dosing process, chemicals are added to the water stream at precisely controlled rates by chemical metering pumps Chemical dosing pumps are used to dispense chemicals into water or air. They can be used for chemical treatment of drinking water, wastewater, swimming pools, ponds, and industrial processes. The pump has an integrated flow meter and pressure gauge.