Southwark Metal 21_25X10 Trunk Duct End Cap 25x10

Product Description

The SOUTHWARK METAL 21_25X10 is a sheet metal trunk duct end cap sized at 25 inches by 10 inches, fabricated from hot dip galvanized steel. End caps of this type seal the open terminus of a rectangular trunk duct run, preventing conditioned air from bypassing the distribution system and maintaining system static pressure. This cap is built to trunk duct dimensions and meets ACCA and SMACNA standards, making it a code-appropriate component for commercial and residential forced-air duct systems. Installation is handled by sheet metal workers and HVAC technicians during new construction or duct retrofit work.

This end cap is suited for rectangular trunk duct applications in forced-air heating and cooling systems where a 25-inch by 10-inch duct termination requires closure. Typical install scenarios include main supply trunk runs that terminate at a wall, floor, or mechanical room boundary. The galvanized steel construction holds up in unconditioned spaces such as attics, crawlspaces, and mechanical rooms where moisture exposure is a factor. It is appropriate for both residential and light commercial ductwork installations conforming to SMACNA rectangular duct construction standards.

Key Features

• Hot dip galvanized steel construction resists corrosion in unconditioned and semi-conditioned spaces
• Sized at 25 inches by 10 inches to match standard trunk duct dimensions
• Trunk-type end cap seals duct terminations and maintains system static pressure
• Meets ACCA and SMACNA applicable standards for forced-air duct construction

Compatibility

Designed as an OEM-style sheet metal end cap for rectangular trunk duct sections measuring 25 inches by 10 inches in forced-air HVAC distribution systems built to SMACNA and ACCA standards.

Installation Notes

Installation is performed by licensed sheet metal workers or HVAC technicians following SMACNA rectangular duct construction guidelines. Power down the air handling unit and confirm the system is depressurized before sealing any duct termination. The cap should be fastened and sealed with approved sheet metal screws and duct sealant or mastic per local mechanical code requirements. Do not use this cap as a substitute for a proper balancing or access component where serviceability is required downstream.

Technical Specifications

• Material: Hot Dip Galvanized Steel
• Size: 25 inches x 10 inches
• Type: Trunk
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 21_25X10