Weil McLain 383-500-025 Gas Valve/Venture Kit

The Weil McLain 383-500-025 Gas Valve/Venturi Kit is an essential OEM replacement component designed specifically for Ultra Gas Boilers (Size 155). As a veteran-grade replacment gas valve, this assembly ensures the negative pressure regulated delivery of fuel required for high-efficiency modulating condensing boilers. This Weil McLain Gas Valve Venturi Assembly is engineered to maintain precise air-to-fuel ratios, supporting the 5:1 turn-down ratio and clean combustion parameters mandated by factory specifications. This 383-500-025 kit provides a complete solution for field repairs or LP propane boiler configurations, helping to restore the safe and efficient operation of the system’s gas management and combustion control. Designed for seamless integration with the existing electronic control board, it accommodates a 24V control signal and features standard 1/2 inch NPT connections. This professional-grade boiler replacement part is critical for technicians performing seasonal maintenance or emergency repairs on Weil McLain Ultra series units.

• OEM Compatibility: Specifically engineered for the Weil McLain Ultra-155 series 3 and 4 boilers to ensure perfect mechanical and electrical alignment.
• Propane Ready: Includes the necessary hardware and gas valve venturi components for LP (Propane) boiler applications.
• Precision Modulation: Optimized for negative pressure regulation, allowing the boiler to maintain high-efficiency thermal performance across all firing rates.
• Complete Service Kit: Packaged with the gas valve, venturi, adapter block, O-ring, and hardware for a professional installation.

Is this kit compatible with all Ultra Boiler sizes?
No, this specific kit (383-500-025) is sized and calibrated for the Ultra-155. For Size 80, 105, or 230 models, a different part number is required to ensure proper gas flow rates.

Does this include the propane orifice?
This kit is designed for use in LP (Propane) boilers and includes necessary hardware for that configuration. Always verify the orifice stamping (e.g., 155-LP) matches your specific boiler requirements upon installation.

Can I install this on a natural gas unit?
While the valve itself is often the same, the venturi kit configuration must match the fuel type and boiler size. If converting from natural gas to LP, ensure you follow all factory guidelines for combustion testing after installation.

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.