for precise fitment and vibration resistance

ensuring consistent performance in any mounting position

including the FM1D14 and FM1D20

Can I touch the igniter element during installation

maintaining system integrity in residential and commercial heating equipment

Lochinvar & A.O. Smith 100233264 Bulbwell for precise fitment and vibrationThe 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