Honeywell 121371A 1/2Inch Copper well 3Inch Insertion

he Honeywell 121371A 1/2-Inch Copper Well with 3-Inch insertion is designed to house temperature sensors in hydronic heating and cooling systems. Installed in boilers, chillers, and other HVAC equipment, it allows sensors to measure water temperature accurately without direct fluid contact, protecting the sensor from corrosion or damage. This copper well ensures reliable readings, simplifies sensor replacement, and supports consistent system control. By improving temperature monitoring, it enhances energy efficiency, reduces maintenance, and helps maintain optimal performance of HVAC operations.