the float and bellows assembly is sold as a standalone mechanical component

ensuring the motor shaft remains perfectly aligned with the blower wheel

this component ensures a leak-proof interface between the pump casing and the motor bracket

making it a reliable drop-in solution for Carrier air handler motor swaps where industrial-grade durability is required

Lochinvar & A.O. Smith 100049890 Port Observation 320788-704 the float and bellows assemblyThe Lochinvar & A. O. Smith 100049890 Port Observation is a critical OEM component designed for high performance commercial boiler maintenance and flame signal monitoring. As a veteran technician knows, maintaining a clear line of sight into the combustion chamber is essential for validating burner performance and ensuring the fuel to air mixture is optimized for peak thermal efficiency. This sight glass assembly is engineered to withstand the extreme