Brass impeller for series 1531 size 1-1/4BB, 1-1/2BB & 1-1/2BC centrifugal pumps. 1-5/8"shaft please state impeller diameter. Also fits series 1510 1-1/4BB & 1-1/2BB.
This impeller is for built-to-order pumps. Bell & Gossett will take a "stock" unit pump and trim the impeller to give an exact performance given the foot of head or pressure and the gallons per minute required. On your I.D. tag is stated series 1510 or 1531 then the impeller diameter along with the GPM and Feet of head.