Integrating this OEM Lennox furnace limit switch restores the furnace's factory safety sequence

In most standard residential environments

Direct Compatibility: Replaces existing Hoffman Specialty 401485 units with a standard 3/4" NPT connection for seamless field retrofits

Utilizes a high-cycle synthetic elastomer diaphragm for consistent response and reduced air leakage over time

Heavy-Duty Construction: Manufactured with materials that withstand the high-temperature environments found in residential furnace cabinets

Armstrong Fluid Technology 428747-231 Adapter 318820-201 Integrating this OEM Lennox furnaceThe Armstrong Fluid Technology 428747 231 Adapter is a precision engineered OEM pump component designed for industrial and commercial fluid management systems. Also referred to as a combination stuffing box and adapter, this part is specifically optimized for use with Armstrong Series 4380 vertical in line pumps and a range of motor frame sizes including 213 215JM. By providing a secure and rigid interface between the pump casing and the motor, the