Pulsafeeders Chem-Tech Series 100-150 is the industry standard by which all other chemical dosing pumps are judged by, Pulsafeeders Chem-Tech Series 100/150 pumps with motorized diaphragm technology deliver dependable performance and extended longevity. Series 100/150 provides quiet, consistent metering over long periods of time in a compact form. Series 100 Models are he preferred metering pump for water conditioning professionals around the world. Perfect for applications where economical, consistent performance is required. Capable of a wide range of flows, from less than 3 gpd (0.47 lph) up to 30 gpd (4.72 lph) and pressures up to 100 psi (7 bar). Series 150 Models are built upon the same solid platform as the 100 Models, these units are capable of higher flow rates. With a range offering up to 100 gpd(15.76 lph), the Series 150 can meet the demands of larger applications. Maximum pressure is 60 psi (4.2 bar).