Honeywell L4008A1015 Remote Bulb Aquastat

Original price was: $195.84.Current price is: $170.59.

19 in stock

SKU: 38000 Category:


The Honeywell L4008A1015 Remote Bulb Aquastat is an immersion-type temperature control device used in boilers, storage tanks, and other applications requiring temperature regulation of liquids. Here’s a comprehensive breakdown of its features and benefits:


  • Remote bulb: The temperature sensor is located at the end of a capillary tube, allowing it to be placed directly in the liquid for accurate temperature sensing.
  • Adjustable range: The operating temperature can be adjusted within a range of 100°F to 240°F, providing flexibility for various applications.
  • Differential adjustment: The switch point can be adjusted with a 5-30°F differential, allowing you to set the desired temperature range for activation.
  • Single-pole, single-throw (SPST) switch: The aquastat controls the system by opening or closing the electrical circuit based on the sensed temperature.
  • Totally enclosed: The switch and internal components are protected from environmental factors, ensuring reliability and long-lasting performance.
  • Horizontal or vertical mounting: The aquastat can be mounted in various positions to suit your needs.
  • 5 1/2′ capillary tube: The standard capillary tube length offers flexibility for installation in various tank sizes and configurations.


  • Precise temperature control: The remote bulb design ensures accurate measurement of the liquid temperature, leading to precise control and optimal system efficiency.
  • Versatility: The adjustable range and differential make it suitable for a wide range of applications, from heating boilers to domestic hot water tanks.
  • Reliable operation: The enclosed design and durable construction ensure long-lasting performance in demanding environments.
  • Easy installation: The simple design and mounting options make installation straightforward for both professionals and DIY enthusiasts.
  • Energy efficiency: Precise temperature control can help optimize system operation and potentially reduce energy consumption.

Things to consider:

  • Compatibility: Ensure the aquastat’s operating voltage and amperage rating are compatible with your system’s requirements.
  • Capillary tube length: Choose the appropriate capillary tube length based on your tank size and installation needs.
  • Differential adjustment: Set the differential appropriately to avoid unnecessary system cycling and ensure efficient operation.
  • Professional assistance: While generally straightforward, consider seeking professional assistance for installation and wiring, especially for complex systems or if you’re unfamiliar with electrical work.

Overall, the Honeywell L4008A1015 Remote Bulb Aquastat is a reliable and versatile option for temperature control in various liquid heating applications. Its accurate sensing, adjustable range, and durable construction make it a valuable choice for both residential and commercial settings.

Additional information

Weight 1.57 lbs


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