Replacement Hot Water Circulator Pump Motor by Nidec Corp.Direct Replacement for Armstrong 816678-069A and Bell & Gossett 1692371.5 HP, 1725 RPM, 4.7-4.5/2.2 amps208-230/460 Volts, 3 phase56CZ Frame SizeODP EnclosureShaft: 5/8" dia x 1.25" keyedService Factor: 1.15Ball BearingsInsulation Class BFor use with adjustable base1 Year WarrantyCross Ref: H1044, H1044L, 4UE21, 816678-069A, 169237