Southwark Metal 21_22X10 Trunk Duct End Cap 22x10

Product Description

The SOUTHWARK METAL 21_22X10 is a sheet metal trunk duct end cap sized at 22 inches by 10 inches, fabricated from hot-dip galvanized steel. It is designed to close off the open terminus of a rectangular trunk duct section, preventing airflow bypass and maintaining system static pressure. This type of fitting is a standard component in forced-air HVAC distribution systems. HVAC sheet metal installers and ductwork mechanics fit this cap during new construction, system modification, or whenever a trunk run is terminated or capped off during phased installation.

This end cap is suited for residential and light commercial forced-air duct systems where a 22-inch by 10-inch rectangular trunk duct requires closure. It is appropriate for use in supply or return trunk applications where the duct run must be sealed at the endpoint. The hot-dip galvanized steel construction makes it suitable for installation in unconditioned spaces such as attics, crawlspaces, and mechanical rooms where moisture resistance is a factor.

Key Features

• 22 inches by 10 inches nominal size fits standard rectangular trunk duct of the same dimension
• Hot-dip galvanized steel construction provides corrosion resistance in unconditioned and semi-conditioned spaces
• Trunk-type fitting closes the open end of a rectangular duct run to maintain system pressure balance
• Meets applicable ACCA and SMACNA standards for sheet metal ductwork fabrication

Compatibility

Designed as an OEM-style sheet metal fitting for rectangular trunk duct systems measuring 22 inches by 10 inches, fabricated to ACCA and SMACNA standards for forced-air HVAC ductwork.

Installation Notes

Installation is performed by a licensed HVAC technician or qualified sheet metal mechanic. The air handling system should be powered down and the blower de-energized before fitting any duct termination cap. Secure the end cap to the duct with sheet metal screws and seal all joints with UL 181-rated mastic or foil tape per SMACNA guidelines. Do not rely on duct tape alone as a long-term air seal.

Technical Specifications

• Size: 22 inches x 10 inches
• Material: Hot Dip Galvanized Steel
• Type: Trunk
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 21_22X10