Weil McLain 383-501-030 Gas Valve

The Weil McLain 383-501-030 Gas Valve is an essential OEM replacement component specifically engineered for Ultra 105 series boilers. As a veteran-grade boiler gas valve replacement kit, it includes the factory-assembled gas valve, venturi, 90-degree elbow, gaskets, and mounting hardware. Operating on a standard 24V AC circuit with a 1/2-inch NPT connection, this assembly ensures precise fuel-to-air mixture control for condensing boiler systems. For technicians performing a Weil McLain Ultra service, this kit simplifies the process of resolving firing failures or improper combustion. While the unit arrives configured for natural gas, it is compatible with LP applications; however, contractors must reinstall the existing propane orifice and verify manifold pressures during commissioning. The robust brass and stainless steel construction within this HVAC gas valve kit provides the reliability required for high-efficiency residential heating. Utilizing genuine Weil McLain parts guarantees that the venturi throat and valve modulation align perfectly with the boiler’s air signal, maintaining system integrity and peak thermal performance.

Key Benefits:

• Full Assembly Integration: Includes the 383-501-030 valve, venturi, and necessary replacement gaskets for a complete manifold refresh.
• Precise Modulation: Engineered to provide accurate gas flow control specifically for the modulation curves of Ultra 105 boilers.
• OEM Compatibility: Ensures seamless physical fitment and electrical communication with the Weil McLain U-Control module.
• Application Versatility: Suitable for both natural gas and liquid propane units (with appropriate orifice adjustments).

Common Questions:

Does this kit include the orifice for propane conversion?
No, this assembly is typically set for natural gas. When installing on an LP system, you must transfer the brass propane orifice from the old valve and use the included fresh gaskets to prevent leaks.

What is the primary cause of replacement for this specific valve?
Technicians often replace the Weil McLain 383-501-030 when experiencing internal solenoid failure or venturi clogging that leads to ignition lockout or "no flame" error codes on the U-Control display.

Is this a universal part for all Weil McLain Ultra boilers?
No, this kit is specifically sized for the Ultra 105 model. Larger or smaller Ultra units (such as the 80 or 155) require different valve/venturi configurations to match their specific BTU outputs.

This item is not eligible for free shipping.

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.