This industry-standard code indicates the switch opens at 170°F (L170) and has a 50-degree differential

this valve ensures efficient media management across varied thermal and pressure conditions

032" orifice optimized for stable natural gas combustion and reliable flame rectification

this is specifically engineered for high-efficiency condensing boilers and water heaters like the Armor and Knight series

Can I use this to replace a 32-inch lead model

Lochinvar & A.O. Smith 100112429 Switch R-407A This industry-standard code indicates theThe Lochinvar & A. O. Smith 100112429 Blocked Flue Switch is a critical safety component designed for high efficiency water heaters and commercial boilers. As a normally closed thermal switch, it monitors the venting system for atmospheric pressure imbalances or physical obstructions that could lead to dangerous carbon monoxide accumulation. Engineered for precision, this OEM replacement part triggers a system shutdown if it detects flue gas backup,