99159445 Grundfos DDE Series Digital Dosing Pump, Type Key: DDE 200-4 B-SS/V/SS-F-31A3A3BG. 3/4″ x 3/4″ NPT Female Connection, 100-240 Volts, 60 Hz, 1 Ph (Single Phase), Stainless Steel Dosing Head, Stainless Steel Valve Ball, FKM Gasket. 52.83 GPH Max Flow, 58 PSI Max Pressure, 122 °F Max Operating Temp. Basic (DDE) Control Variant w/Front-Mounted Control Panel & Standard Valve.