Resideo by Honeywell 121371B Copper Aquastat Well Assembly 3/4" NPT with Mounting Clamp

The Resideo by Honeywell 121371B is a copper well assembly designed for use with aquastat sensors, allowing temperature sensing in pressurized vessels. This immersion well includes a mounting clamp for secure installation and is ideal for boiler systems, hydronic heating applications, and hot water temperature control.

Key Specifications:

• Material: Copper construction
• Thread Size: 3/4 inch x 14 NPT spud connection
• Insertion Length: 3 inches
• Insulation Depth: 1-1/2 inches
• Internal Shell Diameter: 3/8 inch
• Compatible Bulb Size: 3/8 inch x 3 inches
• Capillary Diameter: 5/64 inch

Features & Benefits:

• Protects sensing bulb from direct contact with controlled medium while allowing efficient heat transfer
• Permits removal of sensing bulb for testing or replacement without draining the system
• Compatible with Resideo/Honeywell aquastat controllers including L4006, L6006, and L4080 series
• Durable copper construction for long-lasting performance in heating applications
• Includes mounting clamp for secure, professional installation

This product must be installed by a qualified/licensed contractor with properly calibrated test equipment. The 121371B is commonly used in residential and commercial boiler systems, hydronic heating installations, and hot water temperature control applications.