Weil McLain, 623900109, Baseboard Left Sub Assembly, 6 ft, 9-3/4 in, Cast Iron

Weil-McLain 623-900-109 – 6-Foot Left-End Cast Iron Hydronic Baseboard Panel

The Weil-McLain 623-900-109 is a 6-foot left-end leg panel engineered for integration into the Weil-McLain cast iron baseboard radiation system. Designed for use in both steam and hot water heating applications, this unit delivers consistent, even heat with the durability required for long-term commercial or residential performance.

Engineered for Reliable Hydronic Performance

• Material: Cast iron body for high thermal mass and superior durability
• Configuration: Factory-assembled left-hand leg panel, designed to terminate one end of a baseboard run
• Application: Compatible with Weil-McLain 2’ and 3’ baseboard sections for creating custom-length assemblies
• System Type: Suitable for closed-loop hot water or low-pressure steam systems

Key Features

• Consistent Heat Output: Cast iron construction retains and radiates heat evenly across the unit, minimizing cold zones
• Quiet Operation: Unlike fin-tube convectors, cast iron panels operate silently—ideal for residential and institutional settings
• Modular System: Interlocks with other Weil-McLain baseboard sections for scalable system design
• Service Life: Resistant to corrosion, thermal stress, and mechanical wear; ideal for high-usage environments

Technical Specifications

• Model: 623-900-109
• Length: 6 feet nominal
• End Type: Left-hand leg panel (typically used to terminate the left side of a baseboard run)
• Material: Cast iron
• Mounting: Floor-mounted using integrated legs
• System Compatibility: Compatible with Weil-McLain hydronic baseboard assemblies

Installation Considerations

This unit is designed for floor-mounted applications and direct hydronic piping. Installation should be performed by licensed HVAC or plumbing professionals familiar with hydronic design principles, especially in systems utilizing gravity-fed or low-mass boilers. Proper pitch, support, and thermal expansion considerations are essential for safe, efficient operation.

Use Case Scenarios

• Retrofits: Suitable for upgrading existing cast iron radiation systems in older homes or buildings
• New Construction: Ideal for applications requiring long-term performance and low-maintenance heat output
• Institutional Settings: Frequently used in schools, libraries, and offices due to silent operation and high durability