Circulating Pump Coupler, Compatible with Brand Bell and Gossett, Compatible with Grainger Part Number 4RC97, 4RC98, 4RC99, 4RD01, 4RD02, 4RD03, Compatible with Manufacturer Model Number 102218, 102222, 102226, 2-1/2 In. AB, HD3 AB, LD3 AB, Compatible...