When your Sure-Flex Plus size 12 system requires a field-serviceable elastomer

Designed for gas furnace ignition systems

Fuel Adaptability: Comes with both Natural Gas (installed) and LP-Gas orifices for immediate field adjustment

HVAC safety circuits require the exact pressure rating specified by the manufacturer

OEM Compatibility: Engineered as a direct drop-in for Robertshaw 41-408N

Lochinvar & A.O. Smith 100093874 Valve 323613-751 When your Sure-Flex Plus sizeThe Lochinvar & A. O. Smith 100093874 is a specialized LP Gas Control Valve designed for high performance water heating systems. This direct replacement for 316158 001 ensures seamless integration with specific liquid propane fired commercial and residential units. Engineered for precise fuel regulation, this valve manages manifold pressure to maintain optimal combustion efficiency and thermal output. Known in the field as a critical OEM replacement