Lochinvar & A.O. Smith 100233264 Bulbwell 000 AFC (Available Fault Current)

000 AFC (Available Fault Current) safety rating and non-PCB oil

Durable Construction: Heavy-duty housing designed to withstand the thermal demands of heating and cooling equipment

What is the difference between the 42089 and the Y90AA-4211

5 stem assemblies are technically identical in length

Lochinvar & A.O. Smith 100233264 Bulbwell 000 AFC (Available Fault Current)The Lochinvar 100233264 Bulbwell is a precision engineered immersion well designed for accurate temperature sensing in commercial boilers and water heaters. As a direct OEM replacement part, this component ensures the aquastat sensor or thermostat bulb is properly isolated from the high pressure system fluid while maintaining optimal thermal conductivity. This specific model is functionally identical to Lochinvar TST2301 and TST2301K, providing a