Lochinvar & A.O. Smith 100171923 Gas Valve Assembly 318973-401 Once the temperature falls below

Once the temperature falls below the 450°F threshold (+/- tolerance)

leak-free installation into existing gas trains

The component is identified by a distinct yellow color dot

Reliable Starting: Optimized for 208-230V systems to ensure consistent startup even during peak grid demand

The sensor is physically installed on the valve

Lochinvar & A.O. Smith 100171923 Gas Valve Assembly 318973-401 Once the temperature falls belowThe Lochinvar & A. O. Smith 100171923 is an OEM natural gas valve assembly engineered for high efficiency commercial boilers and water heaters, including the KBN700 series. As a critical component in the combustion string, this negative pressure gas valve regulates fuel flow with precision to maintain a stable air gas mixture across varying firing rates. Designed to integrate seamlessly with integrated control boards, it ensures reliable ignition and