Lochinvar & A.O. Smith 100233613 Bulbwell

The Lochinvar & A.O. Smith 100233613 Bulbwell is a critical OEM replacement part designed for high-precision thermal monitoring in commercial and residential hydronic systems. This immersion well features a 3/8" NPT connection with a .210" ID, specifically engineered to house and protect temperature sensors and bulbs from direct fluid contact. By facilitating rapid heat transfer while maintaining a pressure-tight seal, the 100233613 ensures that your boiler control system receives accurate, real-time data for firing rate modulation and limit safety. Constructed for durability in demanding HVACR environments, this bulbwell is a direct fit for Lochinvar Copper-Fin II models ranging from 987 to 2067, as well as various A.O. Smith water heaters and Knight series boilers. Integrating this genuine Lochinvar bulbwell prevents sensor corrosion and eliminates potential leak points at the sensing location. For contractors performing annual boiler maintenance or troubleshooting temperature sensor errors, utilizing this 3/8 NPT bulbwell is essential for restoring system calibration and ensuring the longevity of the heating plant's sensitive electronic controls.

• Precise Thermal Conductivity: Optimized for the .210" ID sensor profile to provide ultra-fast response times for aquastat bulbs and NTC thermistors.
• Universal Boiler Compatibility: Seamlessly integrates with Lochinvar CBL, CBN, and CWN model series and A.O. Smith commercial units.
• Pressure-Tight Integration: The 3/8" NPT thread provides a reliable, industry-standard mechanical connection capable of withstanding standard hydronic operating pressures.
• Sensor Protection: Acts as a robust barrier against sediment buildup and chemical corrosion, extending the service life of your water heater temperature sensors.

What is the inner diameter of the 100233613 Bulbwell?
This unit features a .210" internal diameter, making it specifically compatible with narrow-profile sensing bulbs and capillary tubes used in Lochinvar and A.O. Smith systems.

Can this well be used in both hydronic boilers and domestic water heaters?
Yes, the 100233613 is designed for versatility across both Copper-Fin II boilers and potable water heating applications, provided the 3/8" NPT port is available.

Does this part include the sensor or thermostat bulb?
This is the bulbwell (immersion well) only. The electronic temperature sensor or mechanical thermostat must be purchased separately if a full control replacement is required.

This item is not eligible for free shipping.

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.