Hot Water Circulating Pump, Hot Water Circulating Pump, HP 1/17 hp, Voltage - Pumps 115V AC, Phase - Pumps 1, Connection Style Flange, Inlet/Outlet Size 1 in, Shut-Off 20 ft, Housing Material - Pumps Cast Iron, Max. GPM @ Head 20 gpm @ 0 ft, Series COMPASS 20, Face to Face Dimension 6 1/2 in, Best Efficiency GPM @ Head 10 gpm @ 10 ft, Min. GPM @ Head 0 gpm @ 20 ft, Drive Type Direct, Height 6 1/2 in, Length 7 1/8 in, Width 4 in, Loop Configuration Closed, Flange/Union Included No