Southwark Metal ATDRP_20IN Duct Takeoff 20 Inch Round

Product Description

The SOUTHWARK METAL ATDRP_20IN is a round saddle-style sheet metal duct takeoff designed for branch connections in forced-air HVAC distribution systems. Fabricated from hot-dipped galvanized steel, this Air-Tite fitting provides a secure, low-leakage connection point where a branch duct splits from the main trunk. The saddle design conforms to the main duct surface and is sized at 20 inches in diameter for both the trunk opening and the branch collar, making it suited for high-volume airflow applications. Licensed HVAC sheet metal mechanics and ductwork installers are the primary trades working with this fitting.

This takeoff is used in residential and light commercial forced-air systems where a 20-inch round branch connection is required off a rectangular or round main trunk. The Air-Tite construction meets ACCA and SMACNA standards, making it appropriate for installations where duct leakage compliance is a project requirement. It is commonly installed in larger commercial rooftop or air handler systems, mechanical rooms, and high-capacity residential zoning setups where maintaining system static pressure and balanced airflow are priorities.

Key Features

• Hot-dipped galvanized steel construction for corrosion resistance in conditioned and unconditioned spaces
• Air-Tite saddle design minimizes duct leakage at the branch connection point
• 20-inch diameter on both Size A and Size B for full-bore round branch takeoff
• Meets ACCA and SMACNA applicable standards for sheet metal ductwork fabrication
• Round saddle profile seats flush against main duct for consistent sealing surface

Compatibility

Designed as an OEM-style replacement and new-installation fitting for 20-inch round branch takeoff applications in forced-air HVAC duct systems built to ACCA and SMACNA standards.

Installation Notes

Installation should be performed by a qualified sheet metal mechanic or licensed HVAC technician following SMACNA duct construction standards and local mechanical codes. Shut down and lock out the air handling unit before cutting into an existing main trunk. Secure the saddle fitting with sheet metal screws and seal all joints with UL 181-listed duct sealant or mastic as required by code. Do not substitute foil tape alone as the primary seal on pressure-class ductwork without confirming local code allowance.

Technical Specifications

• Material: Hot-Dipped Galvanized Steel
• Size A (Trunk Opening Diameter): 20 inches
• Size B (Branch Collar Diameter): 20 inches
• Type: Air-Tite, Saddle, Round
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: ATDRP_20IN