Weil-mclain wm560528979 Main Burner Orifice Natural Gas 3.95 Mm Lgb Series Boilers

Product Description

The Weil-McLain wm560528979 is a main burner orifice designed for natural gas applications in commercial and residential heating systems. This orifice is sized at 3.95 mm and is a direct replacement part for Weil-McLain LGB series cast iron sectional boilers. The main burner orifice controls the flow of natural gas into the burner assembly. It meters fuel at a precise rate to support stable, efficient combustion. When an orifice wears, corrodes, or becomes blocked, burner performance drops. Flame patterns become uneven and fuel efficiency suffers. Replacing the orifice with the correct factory-spec part restores proper combustion and heating output. HVAC technicians and boiler service professionals rely on exact-size orifices to maintain safe and efficient boiler operation. Using an incorrectly sized orifice can cause incomplete combustion, sooting, or unsafe operation. The wm560528979 is manufactured to match the original factory specifications for the LGB boiler line. This ensures a proper fit and correct gas flow rate without modification. The 3.95 mm orifice diameter is calibrated specifically for natural gas service. It is not suitable for liquid propane applications without verifying compatibility. This part fits a wide range of LGB series boilers, including models LGB-30, LGB-35, LGB-40, LGB-45, LGB-50, LGB-55, LGB-65, and LGB-75. These are large cast iron boilers commonly found in commercial buildings, schools, and multi-family residential properties. Keeping these boilers running at peak efficiency requires accurate replacement parts. The wm560528979 main burner orifice is a reliable, factory-compatible solution for scheduled maintenance or emergency repairs on Weil-McLain LGB boilers.

• 3.95 mm natural gas orifice sized to factory specifications for precise fuel metering
• Compatible with Weil-McLain LGB-30 through LGB-75 cast iron sectional boilers
• Direct OEM replacement part for maintaining safe and efficient burner combustion

Product Highlights

The Weil-McLain wm560528979 main burner orifice delivers accurate natural gas metering for LGB series boilers, restoring proper combustion and heating efficiency. It is an essential replacement part for HVAC technicians servicing Weil-McLain commercial and residential heating equipment.

Product Information

Standard Information

• Brand: WEIL-MCLAIN
• Manufacturer Part Number: wm560528979

Technical Specifications

• Fuel Type: Natural Gas
• Orifice Diameter: 3.95 mm
• Compatible Models: LGB-30, LGB-35, LGB-40, LGB-45, LGB-50, LGB-55, LGB-65, LGB-75
• Part Type: Main Burner Orifice
• Application: Cast Iron Sectional Boiler