Lochinvar & A.O. Smith 100187874 Gas Valve//Venturi Assembly 321894-706 25" WC to prevent furnace

25" WC to prevent furnace ignition under hazardous venting conditions or restricted heat exchangers

Using it with R-22 will result in improper superheat and potential system failure

while the automatic reset functionality ensures consistent operation across 24V to 277V AC circuits

Advanced Aeration Design: Prevents linting and ensures proper air-to-fuel ratios for clean combustion

Weight Operated

Lochinvar & A.O. Smith 100187874 Gas Valve//Venturi Assembly 321894-706 25" WC to prevent furnaceThe Lochinvar & A. O. Smith 100187874 Gas Valve Venturi Assembly is a critical OEM component designed for high efficiency natural gas condensing boilers and water heaters. As a veteran technician knows, maintaining the correct air gas stoichiometric ratio is essential for peak combustion performance. This assembly integrates a precision SIT gas control valve with a specifically calibrated venturi to ensure stable gas pressure regulation across varying