Grundfos 59896155 SuperBrute Recirculator Pump, Small, RED Cast iron Flow range: 0- 15.5 U.S. GPM, Head range: 1- 15-Feet Motors: 2 Pole, Single Phase, 115-Volt Connection: Flange - (2) 1/2-Inch bolt holes (flanges not included) Maintenance-free, low energy consumption, easy to install, quiet running