Lochinvar & A.O. Smith 100172016 Gas Valve

The Lochinvar & A.O. Smith 100172016 Natural Gas Valve is a critical combustion control component engineered for high-efficiency hydronic boilers, water heaters, and commercial pool heaters. This 24V gas valve is factory-set for a 3.5" WC (water column) manifold pressure, ensuring precise fuel-to-air ratios and stable burner performance. Designed with a 3/4" NPT inlet and outlet, this assembly provides the high-flow capacity required for demanding Lochinvar Copper-Fin models, including the CB, CW, and CS series (985-2065), as well as compatible A.O. Smith units. As a direct OEM replacement for VAL3403 and Honeywell VR8303M4897, it offers a drop-in solution for technicians addressing ignition failures or gas valve relay faults. Utilizing an authentic 100172016 gas valve kit preserves the system efficiency and combustion safety of the appliance, mitigating the risks of improper gas regulation or pressure fluctuations that can lead to soot buildup or heat exchanger damage.

Key Benefits

• Precise Pressure Regulation: Pre-calibrated at 3.5" WC to maintain optimal thermal output and clean combustion for natural gas systems.
• Direct OEM Compatibility: Functionally identical to VAL3403 and VR8303M4897, ensuring seamless integration with existing 24V furnace controls and wiring harnesses.
• Industrial-Grade Construction: Built to withstand the high-cycle demands of commercial boilers and water heating applications.
• Standardized Plumbing: Features 3/4" gas valve connections for straightforward field installation without the need for additional adapters in matched systems.

Common Questions

Is this valve compatible with LP (Propane) systems?
This specific 100172016 model is configured for natural gas. While some valves in this series can be field-converted, it is essential to use the correct manufacturer-approved conversion kit to ensure safe manifold pressure levels.

What are the symptoms of a failing Lochinvar gas valve?
Technicians typically look for ignition lockout codes, "No Flame" errors, or a failure to reach zero ghost pressure (in negative pressure systems) when checked with a manometer. Corroded terminals or a failed internal solenoid often result in "GV/Relay Fail" alerts on the control board.

Can I use the 100172016 to replace a VR8303M4848?
Yes, the 100172016 gas valve is documented as a direct functional replacement for several older Honeywell and Lochinvar part numbers, including the VR8303M4848 and VAL3403.

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.