HVAC Circulating Pump, Hydronic Circulating Pump, HP 1/10 hp, Voltage - Pumps 115V AC, Phase - Pumps 1, Connection Style Flange, Inlet/Outlet Size 3/4 in to 1-1/2 in, Shut-Off 23 ft, Housing Material - Pumps Cast Iron, Max. GPM @ Head 18 gpm @ 9.5 ft, Series 2400-10, Face to Face Dimension 6 3/8 in, Best Efficiency GPM @ Head 12 gpm @ 17 ft, Min. GPM @ Head 4 gpm @ 22 ft, Drive Type Direct, Length 6 7/8 in, Width 4 1/2 in, Loop Configuration Closed, Flange/Union Included No