Lochinvar & A.O. Smith 100208569 Bulb Well

Install the Lochinvar & A.O. Smith 100208569 Bulb Well to ensure high-precision thermal monitoring in hydronic heating systems. This 1/4-inch NPT HVAC temperature sensor well is a direct OEM replacement designed to house analytical probes for accurate aquastat or controller feedback. As a veteran-grade boiler replacement part, it is functionally identical to the TST2044 and TST2044K legacy models. The 100208569 is engineered for Lochinvar Knight and A.O. Smith standard boiler configurations, providing a leak-proof interface that prevents system fluid from contacting the sensing bulb while maintaining maximum thermal conductivity. This ensures your water heater temperature control system receives rapid response data to prevent short-cycling. Built with corrosion-resistant materials, this 1/4 NPT bulb well handles high-velocity flow and standard residential or commercial pressure ratings without degradation. Whether you are performing routine maintenance or a critical system repair, utilizing this genuine Lochinvar sensor well maintains the integrity of the heat exchanger's monitoring circuit.

Key Benefits

• Universal Compatibility: Serves as the official successor to TST2044 and TST2044K, ensuring a perfect fit for existing sensor ports.
• Enhanced Thermal Transfer: Precision-machined 1/4 bulb well walls allow for rapid heat exchange from the system fluid to the sensor probe.
• System Protection: Isolates the temperature bulb from the high-pressure environment, allowing for sensor replacement without draining the entire boiler loop.
• OEM Reliability: Manufactured to Lochinvar & A.O. Smith specifications to ensure long-term hydronic system stability.

Common Questions

How do I know if the 100208569 will fit my current probe?
This unit is a standard 1/4-inch diameter well. It is designed to accommodate standard HVAC temperature probes used in most Lochinvar Knight and A.O. Smith series boilers.

Can I use this to replace a TST2044 well in an older system?
Yes, the 100208569 is the direct superseded part for the TST2044 and TST2044K, matching all thread depths and internal diameters.

Does this include the thermal paste for the sensor?
This listing is for the physical bulb well hardware only. We recommend applying a high-quality thermal conductive compound inside the well during installation for the most accurate readings.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.