Southwark Metal 21_18X10 Trunk Duct End Cap 18x10 in

Product Description

The SOUTHWARK METAL 21_18X10 is a hot-dip galvanized steel sheet metal end cap designed to close off the open end of a rectangular trunk duct measuring 18 inches by 10 inches. It provides a secure, airtight termination point for HVAC trunk duct runs, preventing conditioned air from escaping at the duct terminus. Fabricated from hot-dip galvanized steel, this end cap resists corrosion and meets the durability demands of both new construction and retrofit duct work. HVAC sheet metal contractors and duct fabricators are the primary installers of this component.

This end cap is suited for residential and light commercial forced-air HVAC systems where rectangular trunk duct runs require a sealed termination. It is appropriate for use in supply or return air trunk configurations where the 18-inch by 10-inch duct opening must be permanently capped. Its fabrication conforms to ACCA and SMACNA standards, making it a code-consistent choice for duct system installations governed by those guidelines.

Key Features

• Hot-dip galvanized steel construction for corrosion resistance in HVAC duct environments
• Sized for 18-inch by 10-inch rectangular trunk duct openings
• Trunk-type end cap designed for permanent duct termination
• Fabricated to ACCA and SMACNA applicable standards
• Compatible with standard sheet metal duct assembly and installation practices

Compatibility

Designed as an OEM-style sheet metal component for use with 18-inch by 10-inch rectangular trunk duct systems fabricated and installed in accordance with ACCA and SMACNA standards.

Installation Notes

Installation is performed by licensed HVAC contractors or qualified sheet metal mechanics. The air handler or furnace should be shut down and the system de-energized before capping any duct section. The end cap is typically secured using sheet metal screws and sealed with UL 181-rated duct sealant or mastic to ensure an airtight connection. Follow applicable SMACNA duct construction standards and local mechanical codes for fastener spacing and sealing requirements.

Technical Specifications

• Material: Hot Dip Galvanized Steel
• Duct Size: 18 inches x 10 inches
• Type: Trunk End Cap
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 21_18X10