Description
Honeywell 121371A Aquastat® Well – 1/2" NPT, Copper, 3" Insertion
The 121371A is a 1/2" NPT Aquastat® well designed to house remote bulb temperature sensing elements in hydronic heating and hot water systems. It provides secure, accurate placement of sensing bulbs while protecting them from direct contact with the system fluid. Ideal for use with Honeywell Aquastat controllers and similar temperature-sensing devices.
Key Features
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Precision Fit: Designed to accommodate 3/8" diameter bulbs for accurate thermal response.
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Standard Size: 1/2" NPT male thread for universal compatibility with common boiler and tank ports.
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Durable Copper Construction: Corrosion-resistant material ensures longevity and reliable heat transfer.
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3" Insertion Depth: Suitable for most standard immersion temperature controls.
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Integrated Insulation: 1-1/2" insulation sleeve enhances thermal efficiency and reduces ambient heat influence.
Technical Specifications
| Specification | Details |
|---|---|
| Application | Aquastat Accessory |
| Thread Size | 1/2" NPT |
| Insertion Length | 3" |
| Shell Inner Diameter | 3/8" |
| Bulb Size Compatibility | 3/8" x 3" |
| Capillary Opening | 5/64" Diameter |
| Insulation Length | 1-1/2" |
| Material | Copper |
Compatible With:
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Honeywell Aquastats (e.g., L4006, L6006, L6008, L4008 series)
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Other remote bulb thermostats or immersion sensors requiring a 3/8" bulb and 1/2" NPT well
