UPS26-150F 3-Speed Cast Iron Circulator Pump 115V, 1/2 HPGrundfos UPS26 150F 3 Speed Cast Iron Circulator Pump with Insulator 1 2 HP 115V The pump is of the canned rotor type, i. e. pump and motor form an integral unit without shaft seal and with only two gaskets for sealing. The bearings are lubricated by the pumped liquid. Features Ceramic shaft and radial bearings. Carbon axial bearing. Stainless steel rotor can and bearing plate. Corrosion resistant impeller, Composite, PES. Max Flow: 52 gpm Head Max: