Southwark Metal 21_24X10 Trunk Duct End Cap 24x10 in

Product Description

The SOUTHWARK METAL 21_24X10 is a sheet metal trunk duct end cap sized at 24 inches by 10 inches, manufactured from hot dip galvanized steel. It is used to seal the open end of a rectangular trunk duct, preventing air bypass and maintaining system static pressure in forced-air HVAC distribution systems. This end cap meets ACCA and SMACNA fabrication standards, making it suitable for professionally installed ductwork in residential and light commercial applications. Sheet metal mechanics and HVAC installers use this fitting during new duct construction and duct modification work.

This end cap fits rectangular trunk duct measuring 24 inches by 10 inches. It is commonly installed in forced-air heating and cooling systems where a trunk duct run terminates at a wall, floor, or equipment plenum. The hot dip galvanized finish provides corrosion resistance suitable for attic, crawlspace, basement, and unconditioned space installations. It is appropriate for use in both new construction and retrofit duct systems requiring a code-compliant, properly sealed termination point.

Key Features

• Sized at 24 inches by 10 inches for direct fit on matching rectangular trunk duct
• Hot dip galvanized steel construction provides durable corrosion resistance
• Trunk-type end cap seals duct terminations and prevents uncontrolled air leakage
• Fabricated to ACCA and SMACNA standards for commercial and residential ductwork
• Suitable for unconditioned spaces including attics, basements, and crawlspaces

Compatibility

Designed as an OEM-style replacement and new-construction fitting for rectangular trunk duct systems measuring 24 inches by 10 inches, fabricated in accordance with ACCA and SMACNA duct construction standards.

Installation Notes

Installation should be performed by a licensed sheet metal mechanic or qualified HVAC technician. Shut down the air handling system and relieve system pressure before modifying any duct section. Secure the end cap using sheet metal screws and seal all joints with UL 181-listed mastic or foil tape per local mechanical code requirements. Follow SMACNA duct construction guidelines and applicable local codes for fastener spacing and joint sealing.

Technical Specifications

• Size: 24 inches x 10 inches
• Material: Hot Dip Galvanized Steel
• Type: Trunk End Cap
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 21_24X10