Southwark Metal 21_24X12 Trunk Duct End Cap 24x12 in

Product Description

The SOUTHWARK METAL 21_24X12 is a hot-dip galvanized steel sheet metal end cap designed to close off the open end of a rectangular trunk duct. Sized at 24 inches by 12 inches, it terminates airflow at the terminal end of a trunk duct run, preventing air loss and maintaining system static pressure. Fabricated from hot-dip galvanized steel, it resists corrosion in the typical attic, crawlspace, and mechanical room environments where trunk duct systems operate. HVAC sheet metal installers and duct fabricators are the primary trades working with this component.

This end cap is used in residential and light commercial forced-air HVAC systems where rectangular sheet metal trunk duct distribution is employed. It fits the terminal end of a 24-inch by 12-inch trunk duct section, capping the run cleanly and maintaining duct integrity. It is applicable in new construction duct fabrication as well as retrofit or replacement work where an existing trunk duct end cap is damaged or missing.

Key Features

• Hot-dip galvanized steel construction for corrosion resistance in varied installation environments
• 24 inches by 12 inches sizing fits standard trunk duct sections of matching dimensions
• Trunk-type designation for rectangular duct system termination
• Fabricated to ACCA and SMACNA applicable standards for duct construction

Compatibility

Designed as an OEM-style sheet metal end cap for rectangular trunk duct systems measuring 24 inches by 12 inches, fabricated in accordance with ACCA and SMACNA duct construction standards.

Installation Notes

Sheet metal duct end caps are installed by licensed HVAC technicians or sheet metal workers following SMACNA duct construction guidelines. Shut down the air handling unit and confirm the system is de-energized before working inside the duct system. The end cap should be secured and sealed with appropriate duct sealant or mastic per SMACNA standards to prevent air leakage at the termination point. Sheet metal screws and hand seamers are standard tools for this type of work.

Technical Specifications

• Material: Hot Dip Galvanized Steel
• Size: 24 inches x 12 inches
• Type: Trunk
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 21_24X12