Southwark Metal 23_8X8 Duct Collar Takeoff 8x8 Offset

Product Description

The SOUTHWARK METAL 23_8X8 is an offset starting collar designed for sheet metal trunk duct systems in forced-air HVAC installations. Fabricated from hot dip galvanized steel, this collar provides a durable, corrosion-resistant connection point where a branch duct transitions off the main trunk. It seats flush against the trunk wall to form a tight, low-leakage takeoff. The offset body pattern accommodates installations where a straight-style collar will not align with the branch run. HVAC sheet metal mechanics and duct fabricators install this fitting during new construction and renovation ductwork projects in residential and light commercial applications.

This collar is suited for supply or return trunk duct systems where a branch takeoff originates at the trunk. The 8 inch by 8 inch size matches standard rectangular duct openings and works with snap-lock or slip-joint rectangular branch ducts of the same dimension. It is produced to ACCA and SMACNA standards, making it appropriate for duct systems designed and installed under Manual D layout requirements and SMACNA-compliant ductwork specifications. Sheet metal contractors working on forced-air heating and cooling systems will find this fitting compatible with common field-fabricated and pre-fabricated trunk duct assemblies.

Key Features

• Hot dip galvanized steel construction for corrosion resistance in supply and return air applications
• Offset body pattern allows branch alignment where straight collars cannot be used
• Starting collar configuration fits directly onto the trunk duct face to initiate a branch run
• 8 inch by 8 inch opening matches standard rectangular duct dimensions
• Manufactured to ACCA and SMACNA applicable standards for compliant duct system installations

Compatibility

Designed as an OEM-style sheet metal fitting for use with 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 licensed sheet metal mechanic or HVAC contractor familiar with SMACNA duct construction standards. Power down the air handling unit and verify the system is depressurized before cutting into an existing trunk. Secure the collar to the trunk with sheet metal screws and seal all joints with UL 181-rated mastic or foil tape per local mechanical code requirements. Follow ACCA Manual D guidelines for branch sizing and placement to maintain system airflow balance.

Technical Specifications

• Size: 8 inches x 8 inches
• Material: Hot Dip Galvanized Steel
• Body Pattern: Offset
• Type: Starting
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 23_8X8