Southwark Metal ATSD_4IN Duct Takeoff 4 Inch

Product Description

The SOUTHWARK METAL ATSD_4IN is a 4-inch diameter Air-Tite sheet metal duct takeoff designed for forced-air HVAC distribution systems. Constructed from hot dip galvanized steel, this takeoff includes an integrated scoop and damper assembly, allowing technicians to direct and balance airflow at branch takeoff points. The scoop captures a portion of the main duct airflow and redirects it into the branch run, while the damper provides manual volume control. This fitting is built to Air-Tite standards, which minimizes air leakage at the takeoff connection. It is installed by licensed HVAC sheet metal mechanics and service technicians during new construction or duct system retrofits.

This fitting is suited for residential and light commercial forced-air duct systems where branch runs require controlled airflow extraction from a main trunk. The scoop-and-damper configuration makes it particularly useful in balancing applications where individual room or zone airflow needs to be adjusted after installation. It conforms to ACCA and SMACNA standards, making it appropriate for systems designed or inspected under those guidelines.

Key Features

• 4-inch diameter opening sized for standard branch duct connections
• Hot dip galvanized steel construction for corrosion resistance in conditioned air environments
• Integrated scoop directs trunk airflow into the branch run efficiently
• Built-in damper allows manual airflow balancing at the takeoff point
• Air-Tite construction reduces leakage at the fitting connection
• Meets ACCA and SMACNA applicable standards

Compatibility

Designed as an OEM-style replacement or new-installation fitting for residential and light commercial forced-air duct systems using 4-inch round branch duct runs.

Installation Notes

Installation should be performed by a qualified HVAC technician or sheet metal mechanic. The air handling system should be powered down and the supply fan stopped before cutting into the main trunk and fitting the takeoff. Seal all connections with approved duct sealant or mastic per SMACNA installation guidelines to maintain Air-Tite performance. Verify damper operation and set airflow balance after system startup.

Technical Specifications

• Diameter: 4 inches
• Material: Hot Dip Galvanized Steel
• Type: Air-Tite Duct Takeoff
• Inclusions: Scoop and Damper
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: ATSD_4IN