99159420 Grundfos DDE Series Digital Dosing Pump, Type Key: DDE 60-10 AR-PVC/V/C-F-31A7A7BG. 3/4″ x 3/4″ NPT Male Connection, 100-240 Volts, 60 Hz, 1 Ph (Single Phase), Polyvinyl chloride Dosing Head, Ceramics Valve Ball, FKM Gasket. 15.85 GPH Max Flow, 145 PSI Max Pressure, 104 °F Max Operating Temp. Control Variant A with alarm relay and analog input (DDA, DDC) w/Front-Mounted Control Panel & Standard Valve.