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25-inch NPT discharge and compact 3-inch diameter allow for easy installation in 4-inch or larger casings
restoring HVAC system operation once safe temperatures are reached
ensuring a standard 1/2" bore interface for reliable field service
protecting downstream pneumatic equipment from contamination
Markel Products Co. 41041-003 Switch 318973-401 25-inch NPT discharge and compactThe Markel Products Co. 41041 003 Auto Reset Switch is a critical temperature limiting safety device specifically engineered for duct heater applications and electrical heating assemblies. This L170 50F high limit switch functions as a primary thermal cutoff, opening the circuit when the discharge air temperature reaches 170F and automatically closing when the temperature drops to the 50F differential threshold. Built for heavy duty HVAC duct heating
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