Williams P501704 Gas Valve

The Williams P501704 Gas Valve is a critical OEM replacement part engineered for precise manifold pressure regulation in Williams Furnace heating systems. This natural gas control valve is factory-set for a 3.5" WC (Water Column) output to maintain optimal combustion efficiency and thermal output. Designed with standard 1/2" NPT connections, it ensures a secure, leak-resistant interface with existing gas manifolds and pilot lines. Primarily utilized in wall furnaces and console heaters, this Robertshaw gas valve crossover or direct factory replacement provides consistent thermopile-actuated operation, crucial for systems requiring reliable millivolt control. For contractors performing field service, utilizing this genuine Williams Furnace gas valve ensures full compatibility with the burner assembly and thermocouple or thermopile circuits, preventing the erratic pilot outages and pressure fluctuations common with low-tier universal components.

Technical Specifications and Benefits

• System Compatibility: Explicitly designed for Williams Comfort Products furnace series requiring 3.5" WC pressure.
• Standardized Porting: Features a high-flow 1/2" inlet and outlet for streamlined integration into residential and light commercial gas lines.
• Natural Gas Optimization: Calibrated specifically for Natural Gas (NG) applications; not intended for use with high-pressure propane without appropriate conversion.
• Millivolt Integration: Optimized for use with 750mv thermopile systems, allowing for heater operation during power outages.
• OEM Durability: Engineered to withstand high-cycling demands in demanding HVAC environments, ensuring long-term seat integrity and flow regulation.

Frequently Asked Questions

Can the Williams P501704 be used for Propane conversions?
This specific natural gas valve is factory-calibrated for 3.5" WC. Conversions to LP would require a specific kit or a dedicated LP valve variant to ensure the higher manifold pressure requirements are met safely.

How do I identify if the P501704 is the correct replacement for my furnace?
Verify the part number P501704 on your existing valve body or consult the furnace data plate. This valve is the standard NG gas valve replacement for many Williams wall heaters requiring a 1/2" connection.

Does this valve include the pilot adjustment screw?
Yes, as a complete furnace control valve, it includes the necessary adjustments for pilot flame stabilization and manifold pressure monitoring via the integrated taps.

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.