Southwark Metal 21_26X12 Trunk Duct End Cap 26x12

Product Description

The SOUTHWARK METAL 21_26X12 is a sheet metal trunk duct end cap sized at 26 inches by 12 inches, fabricated from hot dip galvanized steel. It is used to close off the open end of a rectangular trunk duct in forced-air HVAC distribution systems, preventing air bypass and maintaining system pressure. The galvanized steel construction resists corrosion in attic, crawlspace, and mechanical room environments. Licensed HVAC sheet metal contractors and duct fabricators install this cap as part of new duct system construction or duct modification work.

This end cap fits trunk duct runs in residential and light commercial forced-air systems where a 26-inch by 12-inch rectangular cross-section is used. It is appropriate for supply or return trunk terminations and is commonly installed at the far end of a main trunk line to cap off the duct run cleanly. Fabrication and installation should conform to ACCA and SMACNA duct construction standards.

Key Features

• Hot dip galvanized steel construction for corrosion resistance in unconditioned spaces
• 26 inches by 12 inches nominal size fits standard rectangular trunk duct
• Trunk-type end cap design closes off duct runs cleanly and maintains system static pressure
• Manufactured to ACCA and SMACNA applicable standards
• Suitable for supply or return trunk termination applications

Compatibility

Designed as an OEM-style sheet metal component for rectangular trunk duct systems with a 26-inch by 12-inch cross-section, installed per ACCA and SMACNA duct construction guidelines.

Installation Notes

Installation is performed by licensed HVAC sheet metal contractors. Power down the air handling unit and relieve system pressure before working on the duct system. Secure the end cap using sheet metal screws and seal all edges with UL 181-rated duct sealant or mastic to prevent air leakage. Duct construction and sealing practices should conform to SMACNA standards and applicable local mechanical codes.

Technical Specifications

• Material: Hot Dip Galvanized Steel
• Size: 26 inches x 12 inches
• Type: Trunk
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 21_26X12