Lochinvar & A.O. Smith 100027861 Gas Valve

The Lochinvar & A.O. Smith 100027861 Gas Valve is a critical combustion control component engineered for precise fuel regulation in high-efficiency heating systems. As the direct OEM replacement for legacy part 078482-002, this 1 1/2" gas valve features robust NPT connections and a durable brass body built for industrial and commercial environments. Designed to interface seamlessly with HVACR equipment, the 100027861 manages negative pressure gas control, ensuring the pilot and main burner receive a stable supply under varying load conditions. It is frequently utilized in boilers and water heaters that require high-capacity flow and modulated operation. By replacing an outdated or failing gas control valve with this updated version, technicians ensure optimal safety and performance while mitigating common issues like ignition failure or fluctuating manifold pressure. This genuine OEM replacement part is the technician's choice for restoring system integrity without modifying existing piping configurations.

• Direct OEM compatibility: Serves as the factory-authorized update for the widely used 078482-002 part number.
• High-capacity flow: The 1 1/2" NPT connection provides the necessary volume for large-scale commercial and industrial applications.
• Enhanced safety: Engineered for reliability in gas-powered appliances, maintaining precise manifold pressure for clean combustion.
• Brass construction: Heavy-duty materials ensure thermal stability and resistance to corrosion in demanding mechanical rooms.

Is the 100027861 compatible with older systems using the 078482-002 valve?
Yes, this part is the manufacturer-designated updated version for any system originally equipped with the 078482-002. It maintains the same physical footprint and functional parameters.

Can this valve be used for both natural gas and liquid propane?
Standard 100027861 units are often configured for a specific fuel type. Always verify the spring kit or factory settings before installation to ensure the valve matches the site's fuel source.

What are the symptoms of a failing 1 1/2" gas valve?
Common indicators include "Ignition Failure" codes on the control board, the smell of gas near the unit, or a "Flame Failure" where the valve fails to open despite receiving the proper 24V signal.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.