Southwark Metal 20_26X10 Trunk Duct Collar 26x10 in

Product Description

The SOUTHWARK METAL 20_26X10 is a straight starting collar designed for sheet metal trunk duct systems in forced-air HVAC installations. Fabricated from hot dip galvanized steel, this collar provides a secure, corrosion-resistant transition point where branch takeoffs connect to the main trunk duct. At 26 inches by 10 inches, it fits standard rectangular duct openings and is built to ACCA and SMACNA standards. HVAC sheet metal mechanics and ductwork fabricators install this fitting during new construction or duct retrofit projects requiring a clean, code-compliant trunk connection.

This starting collar is used in residential and light commercial forced-air systems where a main trunk duct requires a straight takeoff connection point. It is suited for supply-air trunk duct assemblies installed in attics, crawlspaces, mechanical rooms, and conditioned utility areas. The straight body pattern simplifies layout and reduces pressure drop at the trunk connection. Installers working to SMACNA duct construction standards will find this collar consistent with rectangular duct fabrication requirements for low- and medium-pressure systems.

Key Features

• Hot dip galvanized steel construction for corrosion resistance in typical HVAC environments
• Straight body pattern for direct, low-restriction trunk duct connections
• Starting collar type for initiating branch takeoff at the trunk
• 26 inch by 10 inch opening sized for standard rectangular duct systems
• Manufactured to ACCA and SMACNA applicable standards

Compatibility

Designed as an OEM-style sheet metal fitting for rectangular trunk duct assemblies in residential and light commercial forced-air HVAC systems requiring a 26 inch by 10 inch straight starting collar.

Installation Notes

Installation is performed by licensed HVAC technicians or qualified sheet metal mechanics. Shut down the air handling system and lock out the power supply before cutting into or modifying any duct section. Secure the collar to the trunk duct using drive cleats, S-cleats, or sheet metal screws per SMACNA duct construction standards, and seal all joints with UL 181-listed mastic or foil tape to meet local mechanical code requirements. Do not use this fitting as a structural support for other duct sections.

Technical Specifications

• Size: 26 inches x 10 inches
• Material: Hot Dip Galvanized Steel
• Body Pattern: Straight
• Type: Starting
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 20_26X10