Function and safety - This thermocouple automatically blocks the gas flow when the ignition flame goes out while operating with the control valve, providing automatic safety shutoff in case of flame failure. Compatibility and replacement - Replaces the 1980-036 Snap Fit model - Uses a universal adapter to fit a variety of control valves Construction and performance - Made from durable copper with a high temperature resistant sensor - Temperature resistance rated at 750 C Size and fit - Thermocouple length 36 Applications and practical use - Residential gas furnace or boiler: replace a worn Snap Fit thermocouple to maintain safe ignition control and flame safety - Gas water heater with a pilot light: ensures automatic gas shutoff if the pilot flame goes out - Commercial or industrial gas appliances with universal adapter compatibility: enables safe operation with various control valves using the Snap Fit 1980-036 equivalent setup