Weil McLain 383-500-390 Gas Valve Kit for Ultra 310 Boiler 24V 1/2 Inch

The Weil McLain 383-500-390 is a complete gas valve replacement kit designed specifically for Ultra Series 3 boiler model 310. This genuine OEM component is an essential part of the boiler's venturi mixing system, which precisely controls gas flow to ensure optimal combustion efficiency and quiet operation.

Kit Includes:

• 24-volt gas valve assembly with 1/2-inch NPT connection
• Venturi mixing body
• Adapter block and O-ring
• Mounting hardware

Key Features:

• Negative regulated gas valve for precise gas delivery
• Compatible with Ultra 310 model boilers (310,000 BTU input)
• Works with venturi system to mix air and gas for higher efficiency
• Designed for both natural gas and LP applications
• Factory-tested genuine Weil-McLain replacement part

Installation Note: For LP (propane) boiler applications, make sure to reinstall the existing propane orifice when installing this kit. This valve is part of the boiler's precision hydronic data (PhD) technology system that automatically adjusts gas flow rates in response to heating demands.

This replacement gas valve kit restores proper operation to Ultra 310 high-efficiency condensing boilers, ensuring safe, efficient, and reliable performance for residential and light commercial hydronic heating systems.