Bell & Gossett brass impeller, 5-1/4" outside diameter, for B&G Series 60 and 1522 pumps, specifically models 1522 1" AAB, 1522 3/4" AAB, 60-1, 60-2, 1" AA, and 1-1/4" AA. Impellers are installed on the end of the pump shaft, which spins the impeller in turn pumping water, or other liquid, throughout your system.Used On:172301 Series 60 60-1S 1/4HP 115V @5-1/4 IN.172302 Series 60 60-1S 1/4HP 220V @5-1/4 IN.172303 Series 60 60-2S 1/3HP @5-1/4 IN.172308 Series 60 60-2T 1/3HP @5-1/4 IN.172388 Series 60 60-1T 1/4HP @5-1/4 IN.172564 Series 60 60-10S .25HP 1750 RPM 115/1/60173014 Series 1522 1S Pump .25HP 1750 RPM 115/1/60173057 Series 1522 1T Pump .25HP 1750 RPM TRIVOLT/3/60173078 Series 1522 2S Pump .33HP 1750 RPM 115/230/1/60173079 Series 1522 2T Pump .33HP 1750 RPM TRI/3/60173113 Series 1522 15T-1 2HP @5-1/4 IN.Replaces P/N P-56550, PWB-13-Z-335