Lochinvar & A.O. Smith 100163259 Sight Glass Kit 323613-751 Built with heavy-duty bearings and

Built with heavy-duty bearings and a standard NEMA frame mounting pattern

this specific size and bore configuration are frequently found in small-diameter blower applications and inducer motor assemblies within York and Johnson Controls equipment

Direct OEM Compatibility: Engineered to replace 331-09118-000 and 50A51-243 without requiring modification to the mounting footprint or harness

allowing technicians to modulate fan speed based on ambient temperature and load requirements

Lochinvar & A.O. Smith 100163259 Sight Glass Kit 323613-751 Built with heavy-duty bearings andThe Lochinvar & A. O. Smith 100163259 Sight Glass Kit is a critical OEM replacement part designed for high performance visual monitoring in Lochinvar Knight and A. O. Smith residential and commercial boilers. Engineered for high pressure HVACR environments, this kit allows technicians to verify flame ignition and combustion stability without compromising the integrity of the heat exchanger seal. As a direct replacement for obsolete part numbers