2' Cast Iron Baseboard Section, Left Hand

Weil-McLain 623-900-103 – 2-Foot Cast Iron Baseboard Radiator (Left End Section)

The Weil-McLain 623-900-103 is a 2-foot left-end cast iron baseboard radiator section from the Baseray series, engineered for use in hydronic heating applications. This component serves as the terminal left-hand end of a run, equipped with a footed end cap and closed-off connection port. Its cast iron construction supports high thermal mass for efficient, even heat distribution in both residential and commercial settings.

Designed for Performance and Durability

This section delivers consistent radiant and convective heat while retaining temperature longer than fin-tube baseboard alternatives. Its left-hand configuration allows for proper termination at the beginning of a loop or zone. It is fully compatible with standard 1-1/4" Baseray push nipple connections and integrates with other modular Baseray components.

Key Features

• Cast Iron Construction – Provides excellent heat retention, silent operation, and unmatched durability under continuous use.
• Left-Hand Termination – Includes cast end foot and closed-end plate for completing the loop on the left side.
• Hydronic System Ready – Suitable for both hot water and low-pressure steam configurations.
• Factory-Primed – Shipped with a gray primer finish, ready for field top-coating as required by the installation site.
• Seamless Integration – Mates directly with standard Baseray intermediate sections and accessories.

Specifications

• Model Number: 623-900-103
• Length: 24 inches (2 feet)
• Configuration: Left-end section with molded foot and sealed port
• Material: Cast iron
• Connection: 1-1/4" NPT push nipple (standard Baseray connection system)
• Application: Hot water and steam hydronic heating systems
• EDR Rating: Approx. 6.8 square feet

Installation Considerations

Due to the weight and required thermal alignment of cast iron assemblies, installation should be performed by qualified HVAC or plumbing professionals. Proper pitch, pressure testing, and sealing are necessary, especially in steam systems. This unit is field-assembled with push nipples and draw bolts, which must be torqued evenly to ensure a leak-free seal.

Contractor Notes

• System Compatibility: Works in both retrofit and new installations.
• Noise-Free Performance: Unlike light-gauge steel baseboard, cast iron eliminates expansion/contraction noises.
• Structural Support: Be sure to provide solid anchoring points due to unit weight (approx. 35–40 lbs per linear foot).