Grundfos 00529912 Union Adapter Set 321894-708 which includes the internal motor

which includes the internal motor protection

and 2250 models

preventing overheating during high-load cycles

Its modified linear flow characteristic allows for stable modulation in chilled water

Direct OEM Fit: Ensures exact physical dimensions and electrical compatibility for Trane MOT17560 Blower Motor replacement

Grundfos 00529912 Union Adapter Set 321894-708 which includes the internal motorEnsuring a secure, leak free connection for hydronic systems requires the right metallurgy and precision threading. This Grundfos 00529912 Union Adapter Set is specifically engineered for bronze pump housings used in open loop domestic hot water recirculation and radiant heating applications. The 3 4" NPT female connection provides a standard interface for rigid copper or PEX piping, while the union design allows for rapid pump isolation and removal