Weil-McLain, 321811125, Block Section Assembly

Weil-McLain Section Assembly – For EG 50/55 and PEG 50/55 Boilers

The Weil-McLain 321811125 section assembly is a factory-specified replacement component for EG and PEG Series 5 boilers, specifically models 50 and 55. This cast iron section is integral to the boiler’s heat exchanger, providing both structural and thermal performance within the pressure vessel assembly.

Engineered for compatibility with steam and water models, this section maintains design integrity under hydronic and low-pressure steam conditions. It is designed to match original specifications for seamless alignment, gasket fitment, and nipple insertion during rebuilds or section replacement work.

Component Application & Function

• Model Fit: Designed for use with EG-50/55 and PEG-50/55 Series 5 boilers
• Material: ASTM-grade cast iron for heat retention and structural integrity
• Function: Forms one of the heat exchanger waterway/steam chamber sections; links with push nipples and sealing gaskets
• Orientation: Can be used in either left or right position depending on manifold configuration

Installation Notes

This section is intended for use by licensed mechanical contractors performing boiler rebuilds, sectional replacements, or field assemblies. Proper handling equipment is required due to the component's weight. It must be installed with Weil-McLain-approved nipples and sealing compounds to maintain pressure ratings and safe operation. Torque specifications and alignment procedures per Weil-McLain’s installation manual must be followed to ensure proper gasket compression and joint integrity.

Additional Considerations

• OEM Replacement: Direct replacement part for field repair of Series 5 EG/PEG 50 or 55 boilers
• Combustion Type Compatibility: Applicable to natural gas or propane-fired EG/PEG units
• Field Assembly: May be installed as part of new knockdown boiler assembly or during sectional repair

Specifications

• Manufacturer Part Number: 321811125
• Series: EG / PEG Series 5
• Compatible Models: EG-50, EG-55, PEG-50, PEG-55
• Material: Cast Iron