Southwark Metal ATD445 Air-tite Takeoff 5 Inches Collar with Model 44 Damper

Product Description

The Southwark Metal ATD445 is a 5-inch Air-Tite Takeoff collar with an integrated Model 44 damper, designed for use in residential and light commercial HVAC duct systems. This takeoff fitting connects a main trunk line to a branch duct run, allowing airflow to be directed and controlled at each supply point. The built-in damper gives HVAC technicians and installers precise control over airflow volume, making balancing a duct system straightforward and reliable. The ATD445 is built from 28-gauge hot-dipped galvanized steel meeting ASTM A653 CS Type B standards, which means it resists rust and corrosion in both conditioned and unconditioned spaces. The galvanized coating holds up in attics, crawlspaces, and mechanical rooms where moisture and temperature swings are common. The collar measures 5 inches in diameter and features a 5 and 3/4 inches tube length with a 1 and 1/2 inches crimp length, making it compatible with standard flexible and rigid branch duct connections. The flanged design seats flush and securely against the trunk duct, and four pre-drilled screw holes allow for fast, consistent installation without field drilling. The damper is constructed from 26-gauge steel with an 18-gauge handle secured by a wingnut with a locking mechanism, so once airflow is balanced, the damper stays set. A 1 and 1/2 inches wide, 1/8 inches thick neoprene foam gasket with high-tack adhesive backing creates an airtight seal between the collar and the duct surface, reducing air leakage and improving system efficiency. The ATD445 carries a pressure rating of plus or minus 4 inches water gauge, making it suitable for standard forced-air systems. It is manufactured in the USA and is sold individually. HVAC installers working on new construction or retrofit projects will find this fitting easy to handle and install in tight spaces.

• 28-gauge hot-dipped galvanized steel construction meets ASTM A653 CS Type B for long-lasting corrosion resistance
• Integrated Model 44 damper with 26-gauge body, 18-gauge locking handle, and wingnut for secure airflow adjustment
• Neoprene foam gasket with high-tack adhesive and four pre-drilled screw holes for a fast, airtight installation

Product Highlights

The Southwark Metal ATD445 delivers a reliable, airtight branch takeoff with a built-in damper for airflow balancing, making it a go-to fitting for HVAC professionals installing or servicing forced-air duct systems.

Product Information

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: ATD445

Technical Specifications

• Diameter: 5 inches
• Gauge: 28 GA
• Material: Galvanized Steel
• Galvanized: Yes
• Flanged: Yes
• Tube Length: 5 and 3/4 inches
• Crimp Length: 1 and 1/2 inches
• Gasket Width: 1 and 1/2 inches
• Gasket Thickness: 1/8 inches
• Pressure Rating: +/- 4 inches w.g.
• Pre-Drilled Screw Holes: 4
• Weight: 0.73 pounds
• Country of Origin: USA
• Prop 65: Yes
• Unit of Measure: Each