Southwark Metal ATSD_7IN Duct Takeoff 7 Inch

Product Description

The SOUTHWARK METAL ATSD_7IN is a 7-inch diameter Air-Tite sheet metal duct takeoff designed for forced-air HVAC distribution systems. Constructed from hot-dip galvanized steel, this fitting delivers corrosion resistance and structural integrity in both residential and light commercial duct installations. It includes an integrated scoop and damper, allowing technicians to direct and regulate airflow at the branch takeoff point without additional fittings. Licensed HVAC mechanics and sheet metal workers install this component when branching supply ductwork from a main trunk line.

This takeoff is suited for supply-side duct systems where precise airflow balancing at individual branch runs is required. The built-in damper allows field adjustment of airflow volume, making it practical in zoned systems or multi-room residential builds where each branch must be tuned independently. The scoop face captures moving air from the trunk and directs it into the branch run, improving static pressure efficiency at the takeoff point. It is appropriate for use in new construction and retrofit trunk-and-branch duct layouts.

Key Features

• 7-inch diameter opening for branch duct connections
• Hot-dip galvanized steel construction for corrosion resistance
• Air-Tite design reduces air leakage at the trunk connection
• Integrated scoop improves airflow capture from the main trunk
• Built-in damper allows field balancing of branch airflow
• Meets ACCA and SMACNA applicable standards

Compatibility

Designed as an OEM-style replacement and new-installation fitting for 7-inch round branch duct connections in residential and light commercial trunk-and-branch forced-air supply systems.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified sheet metal worker in accordance with SMACNA duct construction standards and local mechanical codes. Power down the air handling unit and verify the system is depressurized before cutting into an existing trunk line. Secure the takeoff collar to the trunk with sheet metal screws and seal all joints with listed duct sealant or mastic to maintain system airtightness. Adjust the damper only after the full duct system is assembled and a system balancing procedure is performed.