Slant Fin 410-527-000 Aquastat

The Slant Fin 410-527-000 Aquastat is an essential immersion temperature controller designed for hydronic HVAC systems, specifically for regulating boiler water temperature. This SPST (Single-Pole Single-Throw) aquastat operates within a precise range of 40°F to 180°F, making it ideal for maintaining low-limit or circulator control in residential and light commercial applications. As a veteran-grade HVAC replacement part, it is frequently used as a Slant Fin boiler control to prevent short-cycling and ensure system efficiency by making or breaking the electrical circuit based on direct fluid immersion sensing. This model is often cross-referenced as an alternative to the Honeywell L4006A series. Technicians rely on its robust build to handle the demanding environments of a mechanical room. Whether you are performing a hydronic heating repair or a proactive system tune-up, this immersion aquastat provides the reliable switching and thermal accuracy required for optimal boiler operation and equipment longevity.

• Versatile Range: Covers 40-180°F, suitable for a wide variety of low-limit and circulator applications.
• Direct Immersion: Provides highly accurate temperature sensing via physical contact with the system fluid.
• SPST Logic: Simplified single-pole control for reliable circuit interruption or activation.
• OEM Compatibility: Specifically engineered as a direct replacement part for Slant Fin boiler systems.
• Industrial Build: Designed to withstand the thermal stress and vibration found in hydronic mechanical loops.

Is the immersion well included with this aquastat?
This part number typically refers to the controller itself; always verify if your existing well is compatible or if a new 1/2" or 3/4" NPT well is required for the installation.

Can I use this for high-limit safety protection?
This model's range tops out at 180°F. For high-limit safety cut-off, ensure your system's required setpoint falls within this 40-180°F window; otherwise, a 200°F+ model may be necessary.

Will this work as a replacement for a Honeywell L4006A?
Yes, the Slant Fin 410-527-000 is often used as a field-equivalent for L4006A models that require SPST switching within the 40-180°F temperature range.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.