3/4" Combination Gas Valve

Weil-McLain 511-044-256 – 3/4" Combination Gas Control Valve for Natural Gas Systems

The Weil-McLain 511-044-256 Combination Gas Control Valve is a 3/4-inch NPT valve designed to regulate the flow of natural gas in compatible Weil-McLain heating equipment. Built for compatibility with OEM boiler assemblies, this valve supports consistent system operation with a 24V coil voltage and a step-open function for controlled ignition and operation cycles.

Engineered for performance in residential and light commercial heating applications, this valve is constructed to meet manufacturer specifications and safety requirements for natural gas service. It features a threaded connection for secure installation and is designed to maintain pressure integrity under standard operating conditions.

Key Features

• Connection Size: 3/4" NPT
• Voltage: 24 VAC coil operation
• Gas Type: Natural gas only
• Step Open Feature: 1.2 in step open design for improved ignition sequence
• End Style: Threaded (NPT) for secure line integration

Technical Specifications

• Model: 511-044-256
• Material: Corrosion-resistant body and components suitable for gas-fired systems
• Pressure Rating: Designed for standard inlet pressure ranges for residential heating systems
• Application: OEM replacement or service part for select Weil-McLain natural gas boilers

Installation Guidelines

This gas control valve must be installed by a qualified technician in accordance with all applicable codes and manufacturer instructions. Proper sealing and leak testing are critical. Ensure compatibility with boiler model and verify all control wiring connections match system requirements. Use only approved tools and components for gas service.

Contractor Notes

Designed for use in Weil-McLain natural gas systems, the 511-044-256 offers stable modulation and control for consistent burner performance. The step-open function aids in soft ignition, reducing wear on ignition components and improving combustion control during initial startup. Suitable for replacement in service applications or during full boiler assembly.