Crown 41102 Replacement Circulator Pump Coupling For Bell & Gossett 118723 Replaces: Bell & Gossett P2Z-12291, 118723 Armstrong 806168-001 Dayton / Grainger 4RD27 This Coupler Can Be Used On: Bell & Gossett 102218 2-1/2 IN. Pump .25 HP Single Phase 102219 2-1/2 IN. BI Pump Bronze Impeller .25 HP Single Phase 102220 2-1/2 IN. AB Pump All Bronze .25 HP Single Phase 102222 LD3 Pump .25 HP Single Phase 102223 LD3 BI Pump .25 HP Single Phase 102224 LD3 AB Pump All Bronze .25 HP Single Phase 102226 HD3 Pump .33 HP Single Phase 102227 HD3 BI Pump .33 HP Single Phase 102228 HD3 AB Pump All Bronze .33 HP Single Phase 118724 Coupler/Motor Mount Set Armstrong S-45 and S-46 Dayton / Grainger 4RC97 to 99, 4RD01 to 03