1/2" x 1/2" Combination Gas Valve

Weil-McLain 511-044-381 – 1/2" Combination Gas Valve for Natural Gas Systems

The Weil-McLain 511-044-381 is a 1/2" combination gas valve engineered for use in natural gas-fired heating applications. Designed to regulate and control gas flow to the main burner, this component integrates manual and automatic shutoff functionality for safety and ignition reliability. It is suitable for use in OEM and replacement applications where compatibility with Weil-McLain boilers is required.

This valve supports 24V control circuits and features NPT end connections for standard gas piping configurations. It is compatible with a range of low-pressure natural gas systems and designed to meet manufacturer specifications for pressure and flow requirements.

Key Features

• Control Voltage: Operates on 24V AC power for standard boiler control systems
• Fuel Type: Configured for use with natural gas only
• Valve Type: Combination gas valve with integrated manual and automatic shutoff functions
• Connection Size: 1/2" NPT inlet and outlet
• OEM Compatibility: Suitable for use with Weil-McLain heating equipment (verify model-specific compatibility)

Technical Specifications

• Model: 511-044-381
• Voltage: 24 VAC
• End Connections: 1/2" NPT threaded
• Gas Type: Natural gas only
• Use Case: Primary gas valve for residential and light commercial gas boilers

Installation Requirements

This gas valve should be installed by licensed HVAC or plumbing technicians familiar with boiler gas trains and combustion systems. All connections must be tested for leaks using an approved method. Installation must comply with local mechanical and fuel gas codes. Ensure the boiler is isolated and depressurized prior to installation or service.

Contractor Application Notes

As an OEM replacement or factory-specified component, the 511-044-381 provides consistent burner control and secure shutoff performance. This valve should only be installed in natural gas systems where operating pressures and ignition controls match the valve's design parameters. Do not substitute for LP-compatible models or use outside of listed applications.