Laars Heating Systems W0040900 Pilot Assembly 318172-701 Always inspect the vent terminal

Always inspect the vent terminal for debris before replacing the switch

Where should this valve be positioned in the piping layout

Specifically engineered for high-efficiency commercial water heaters and boilers

The switch opens the circuit to prevent the compressor from operating under excessive head pressure

Laars Heating Systems W0040900 Pilot Assembly 318172-701 Always inspect the vent terminalThe Laars Heating Systems W0040900 Natural Gas Pilot Assembly is a critical OEM component designed for high performance ignition cycles in residential and commercial hydronic systems. As a veteran grade Natural Gas Pilot Assembly, this unit ensures precise flame rectification and reliable pilot burner performance across the Laars Mini Therm JVT series (sizes 50 225) and legacy Teledyne Laars boiler models. Built for the rigors of high duty cycles,