Southwark Metal 21_12X8 Trunk Duct End Cap 12x8 in

Product Description

The SOUTHWARK METAL 21_12X8 is a hot-dip galvanized steel sheet metal end cap designed to close off the terminus of a rectangular trunk duct. Measuring 12 inches by 8 inches, it fits standard trunk duct openings of that cross-section. The hot-dip galvanization process provides a durable corrosion-resistant coating suited for the moisture and temperature cycling common in forced-air HVAC systems. This end cap is fabricated to ACCA and SMACNA standards, which are the recognized benchmarks for sheet metal ductwork quality and dimensional accuracy. HVAC technicians and sheet metal installers use this part when capping off a trunk duct run, sealing the dead end of a supply or return air trunk to prevent uncontrolled air loss.

This end cap is used in residential and light commercial forced-air HVAC installations wherever a rectangular trunk duct requires a sealed terminus. Typical applications include new construction duct systems, duct modification or extension projects, and replacement of damaged or missing end caps on existing trunk duct runs. The 12-inch by 8-inch size corresponds to a common rectangular trunk duct dimension found in both supply and return air configurations.

Key Features

• Hot-dip galvanized steel construction for corrosion resistance in HVAC environments
• Sized at 12 inches by 8 inches to fit standard rectangular trunk duct openings
• Fabricated to ACCA and SMACNA applicable standards for dimensional accuracy and quality
• Trunk-type configuration designed to cap off the end of a rectangular duct run
• Prevents uncontrolled air loss at duct termination points

Compatibility

Designed as an OEM-style sheet metal component for use with standard 12-inch by 8-inch rectangular trunk duct systems in residential and light commercial forced-air HVAC applications built to ACCA and SMACNA standards.

Installation Notes

Installation should be performed by a qualified HVAC technician or licensed sheet metal worker in accordance with SMACNA ductwork installation guidelines. Shut down the air handling unit and confirm the system is de-energized before working on the duct system. The end cap is typically fastened using sheet metal screws and sealed with UL 181-listed duct sealant or foil tape to meet leakage class requirements. Avoid over-driving fasteners into the galvanized material, as this can compromise the corrosion-resistant coating at the fastener points.

Technical Specifications

• Material: Hot Dip Galvanized Steel
• Size: 12 inches x 8 inches
• Type: Trunk
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 21_12X8