Carrier HH18HA499 Limit Switch dryseal taper pipe threads are

dryseal taper pipe threads are specifically engineered to minimize potential leak paths and provide extra clearance for tightening your flare nuts in tight evaporator or condenser compartments

Key Benefits Universal Compatibility: Drop-in replacement for Johnson Controls D-3153 and D-3070 series pneumatic actuators

Its high-temperature tolerance makes it suitable for demanding environments where consistent air pressure regulation and damper positioning are non-negotiable for system performance

Which Series use this specific gasket

Johnson Controls A-4400-610 Bowl O Ring

Carrier HH18HA499 Limit Switch dryseal taper pipe threads areThe Carrier HH18HA499 Limit Switch is a critical high temperature safety component engineered for Carrier, Bryant, and Payne gas furnaces. This automatic reset limit switch is designed to open the electrical circuit when internal plenum temperatures reach the 165F threshold and closes once temperatures normalize to 125F. It serves as a direct replacement for the HH18HA499A model, ensuring field compatibility and maintaining the original safety circuit