Grundfos 52722373 1/6 Horsepower Recirculator Pump 1/6 horsepower Flow Range: 0- 41 GPM, Head Range: 0- 25-Feet Motors: 2 Pole, Single Phase, 115-Volt Connection: Flange - (2) 1/2-Inch Diameter Bolt Holes Maintenance-free, low energy consumption, easy to install, quiet running