This regular gauge glass is intended for standard duty

The 14660001 is specifically rated for gas-fired residential atmospheric boilers

locate the small holes on the underside of the sensor dial

Premature failure is often caused by touching the element with bare hands during installation (leaving oils) or issues with the gas valve delivering improper pressure

These components operate on different voltages and control sequences and are not interchangeable

Lochinvar & A.O. Smith 100327113 Thermostat This regular gauge glass isThe Lochinvar & A. O. Smith 100327113 Thermostat is a critical surface thermostat engineered for high accuracy temperature regulation in commercial and residential water heating systems. Effectively serving as the direct replacement for 100170479 (also identified as old part number TST1121), this component ensures seamless HVAC system compatibility across various Lochinvar DVN and DVL series models manufactured from July 1997 to the present. As a