EN121371A ELITE 1/2" NPT Aquastat Well – 3" Insertion for Honeywell 121371A

The EN121371A ELITE Aquastat Well is a precision-engineered copper immersion well designed as a direct fit for Honeywell 121371A aquastats. Built with durability and conductivity in mind, this well ensures accurate sensor placement and reliable operation in heating systems.

⚠️ Note: Well clamp assembly is sold separately and not included.

✅ Key Features

• Direct replacement for Honeywell 121371A aquastat wells

• 1/2" NPT threaded connection for secure installation

• 3" insertion length for accurate temperature sensing

• Durable copper construction for optimal thermal transfer

• 1-1/2" insulation depth for dependable performance

• Compact and reliable design for long service life

📊 Technical Specifications

⚠️ Common Symptoms of a Faulty or Worn Aquastat Well

If your heating system shows these signs, the well may need inspection or replacement:

✅ Inaccurate or fluctuating temperature readings
✅ Aquastat sensor not seating properly in the well
✅ Visible corrosion or pitting on the copper well
✅ Difficulty threading or securing the well into place
✅ Sensor overheating due to poor thermal transfer

🔄 Quick Reference Compatibility Chart

❓ Frequently Asked Questions (FAQ)

Q: What system does the EN121371A replace?
A: It is a direct replacement for Honeywell 121371A aquastat wells.

Q: What material is the well made of?
A: High-quality copper for optimal thermal transfer and durability.

Q: Is the clamp assembly included?
A: No, the well clamp assembly is sold separately.

Q: When should I replace an aquastat well?
A: Replace if the well shows corrosion, leaks, or fails to hold the sensor securely.

🔧 Aquastat Well Comparison Chart (Elite Series – Honeywell Replacements)