Taco Pro Fit BRG-B-101 Bearing Assembly. Taco's in-line circulator line Pro Fit is an efficient and cost effective replacement to Armstrong and Bell and Gossett's line of circulators. This bracket can replace the Bell and Gossett HV and 2" (new) bearing assembly part number 189120, 189121, 189122, 189129, 189131, 189165. It also can replace the Armstrong bearing assemble part number 816023-001.