Hydronic Circulating Pump, Compatible Intake Pipe Size 1 1/4 in, Connection Type Flange, Face to Face Dimension 6 1/2 in, Flange or Union Included Yes, For Use With Potable Systems No, Horsepower 5/16, Maximum Feet of Head 31 ft, Maximum Flow Rate @ 10 Feet of Head 24 gpm, Maximum Flow Rate @ 15 Feet of Head 19 gpm, Maximum Flow Rate @ 1 Foot of Head 32 gpm, Nameplate Voltage 230V AC, Number of Speeds 3, Phase Single, Pump Type Multi-Speed, Series Family Astro 2