Southwark Metal 21_10X8 Trunk Duct End Cap 10x8 in

Product Description

The SOUTHWARK METAL 21_10X8 is a hot dip galvanized steel trunk duct end cap sized at 10 inches by 8 inches. It seals the open end of a rectangular sheet metal trunk duct, preventing conditioned air from escaping at duct terminations and maintaining system pressure and airflow balance. Fabricated from hot dip galvanized steel, this cap resists corrosion in the humid conditions common to mechanical rooms, crawlspaces, and attic installations. It is designed for installation by licensed HVAC technicians and sheet metal mechanics working on forced-air distribution systems.

This end cap fits rectangular trunk ducts measuring 10 inches by 8 inches. It is suited for residential and light commercial forced-air HVAC systems where a clean, code-compliant duct termination is required. Typical applications include capping unused or seasonal duct extensions, terminating main trunk runs, and sealing duct ends during phased construction. Fabrication and application conform to ACCA and SMACNA standards for sheet metal ductwork.

Key Features

• Hot dip galvanized steel construction resists corrosion in humid or unconditioned spaces
• Sized for 10-inch by 8-inch rectangular trunk ducts
• Seals duct terminations to maintain system static pressure and airflow efficiency
• Meets ACCA and SMACNA applicable standards for sheet metal duct construction
• Trunk duct type — compatible with standard rectangular sheet metal duct systems

Compatibility

Designed as an OEM-style sheet metal component for use with 10-inch by 8-inch rectangular trunk duct systems fabricated and installed in accordance with ACCA and SMACNA standards.

Installation Notes

Installation is performed by licensed HVAC technicians or qualified sheet metal mechanics. Shut down the air handling unit and verify the system is de-energized before working on the duct. Secure the end cap to the duct using sheet metal screws and seal all joints with listed duct mastic or UL 181-rated tape per local mechanical code requirements. Follow SMACNA duct construction standards for fastener spacing and joint sealing.

Technical Specifications

• Material: Hot Dip Galvanized Steel
• Size: 10 inches x 8 inches
• Type: Trunk
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 21_10X8