Hydronic Circulating Pump, Compatible Intake Pipe Size 2 1/2 in, Connection Type Flange, Face to Face Dimension 8 1/2 in, Flange or Union Included Yes, For Use With Potable Systems No, Horsepower 5/16, Maximum Feet of Head 14 ft, Maximum Flow Rate @ 10 Feet of Head 28 gpm, Maximum Flow Rate @ 1 Foot of Head 61 gpm, Nameplate Voltage 115V AC, Number of Speeds 3, Phase Single, Pump Type Multi-Speed, Series Family Astro 2, Maximum Flow Rate @ 5 Feet of Head 46 gpm, Series Astro 290CI, Amps 1.9 A