Resideo - Honeywell Home 123870A Aquastat Sensor Well Assembly

The Aquastat Sensor Well Assembly (123870A) delivers reliable immersion sensing for HVAC and hot-water systems. Built from copper with a robust 3/4 inch threaded connection, it installs quickly and seals firmly. The immersion-type sensor well accommodates a 3/8 inch diameter bulb and a 3 inch length, matching standard immersion sensing probes for precise temperature monitoring. With an insulation depth of 1-1/2 inches, it helps minimize heat loss and protects sensor readings in demanding installations. Rated to 255 PSI at 300°F, this sensor well stands up to high-temperature, high-pressure environments common in boiler rooms.

• Type: Immersion sensor well
• Bulb size: 3/8 in diameter x 3 in length
• Thread size: 3/4 in threaded
• Material: Copper
• Insulation depth: 1-1/2 in
• Pressure rating: 255 PSI at 300°F