Southwark Metal 21_16X10 Trunk Duct End Cap 16x10

Product Description

The SOUTHWARK METAL 21_16X10 is a sheet metal trunk duct end cap designed to close off the terminal end of rectangular trunk duct runs in forced-air HVAC systems. Fabricated from hot dip galvanized steel, it provides corrosion resistance suitable for both conditioned and unconditioned space installations. Sized at 16 inches by 10 inches, it fits standard trunk duct openings of that dimension. HVAC sheet metal mechanics and installers use this cap to seal trunk terminations, prevent air bypass, and maintain system static pressure integrity. Compliance with ACCA and SMACNA standards ensures it meets accepted industry fabrication and installation practices.

This end cap is applied in residential and light commercial ducted HVAC installations where rectangular galvanized trunk duct is used. It is installed at the dead-end terminus of a trunk line to cap off unused or terminal duct openings. Typical applications include new construction duct systems, duct modification work, and service replacements where an existing cap has been damaged or is missing. Sheet metal contractors and HVAC installers handle this fitting as part of standard trunk duct assembly.

Key Features

• Hot dip galvanized steel construction for corrosion resistance in HVAC duct environments
• Sized at 16 inches by 10 inches to fit standard rectangular trunk duct openings
• Trunk duct type fitting for sealing terminal ends of rectangular air distribution systems
• Meets ACCA and SMACNA applicable standards for duct fabrication and installation
• Closes off duct terminations to maintain system static pressure and prevent air leakage

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 16-inch by 10-inch rectangular galvanized sheet metal trunk duct systems built to ACCA and SMACNA standards.

Installation Notes

Installation is performed by licensed HVAC technicians or qualified sheet metal mechanics. Power down the air handling unit and confirm the system is de-energized before working inside duct assemblies. The cap should be secured and sealed per SMACNA duct construction standards, typically using sheet metal screws and approved duct sealant or mastic to prevent air bypass at the joint. Follow local mechanical codes and ACCA guidelines for duct sealing requirements.

Technical Specifications

• Material: Hot Dip Galvanized Steel
• Size: 16 inches x 10 inches
• Type: Trunk
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 21_16X10