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The P499ACS-404 and P499ACS-404C are functionally and physically identical
ensuring the burner circuit remains protected against dry-fire conditions
High pressure ratings: 600 psi body and 200 psi close-off for reliable operation
slip-free operation
or oils from skin contact during installation
Hydrotherm 04-1336 Thermocouple 321894-709 The P499ACS-404 and P499ACS-404C areThe Hydrotherm 04 1336 Thermocouple is a mission critical safety and monitoring component engineered specifically for high performance hydronic systems, including the KN Series boilers. Designed to provide precise millivolt signals to the gas control valve, this OEM Hydrotherm gas boiler part ensures stable flame sensing and prevents hazardous unburned gas accumulation. Its rugged construction is built to withstand the high temperature environments
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