Weil McLain 511-044-286 Valve

The Weil-McLain 511-044-286 Combination Gas Valve is an OEM 24V redundant control designed for high-capacity natural gas applications. Featuring a 3/4" x 1" NPT configuration, this valve ensures precise fuel regulation and reliable ignition sequencing for Weil-McLain commercial boilers and heavy-duty heating units. Built for indirect-fired water heaters and hydronic systems, it maintains strict pressure regulation to optimize combustion efficiency. This natural gas valve replacement is engineered to withstand high-demand cycling, making it a staple for contractors maintaining Weil-McLain boiler parts. The integration of Honeywell or White-Rodgers technology within the Weil-McLain specification ensures a standard footprint for straightforward field installation. Proper boiler gas valve troubleshooting often leads to this specific model when dealing with erratic pilot operation or main burner failure in commercial HVAC systems. Ensure the manifold pressure is clocked correctly to meet nameplate requirements during commissioning.

• Precise Pressure Regulation: Maintains consistent 3.5" W.C. for stable natural gas combustion.
• Redundant Safety Logic: Dual-seat design ensures positive shut-off in the event of power loss or flame failure.
• Versatile NPT Ports: 3/4" inlet and 1" outlet sizing accommodates high-Btu flow rates without significant pressure drops.
• OEM Compatibility: Specifically calibrated for Weil-McLain control boards to prevent nuisance lockouts.

Common Technical Questions

Can this valve be converted to Liquid Propane (LP)?

This specific model is factory-set for natural gas. Conversion requires a manufacturer-approved LP conversion kit; never attempt to adjust the regulator spring for gas type changes without the correct orifices and hardware.

What is the proper voltage range for this gas valve?

This is a 24V AC valve. Ensure the transformer provides at least 40VA to prevent voltage drops that can cause the solenoid to chatter or fail to open.

Does this valve include the pilot tubing compression fittings?

Typically, these units come with standard pilot threading, but it is best practice to reuse or replace the original 1/4" or 1/8" compression fittings based on your specific pilot line setup.

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.