Air Flow Products 840-1-RATD20-000005 Stick-on Takeoff

Product Description

The AIR FLOW PRODUCTS 840-1-RATD20-000005 is an airtight stick-on takeoff designed for round duct pipe and fitted with an integral damper. It attaches directly to the surface of a round main trunk or branch duct, providing a sealed branch outlet without the need for sheet metal cutting or flanged fittings. The unit features a 5-inch diameter opening and a 2-inch standoff, which creates clearance between the duct surface and the takeoff collar. The built-in damper allows the installer to balance airflow at the branch point during commissioning. HVAC sheet metal technicians and duct installers are the primary trades working with this fitting.

This takeoff is suited for residential and light commercial forced-air duct systems where airtight performance is required at branch connections. The adhesive mounting method simplifies installation on round main ducts, reducing labor time compared to traditional cut-in collars. The integrated damper makes it appropriate for zoned systems or applications where individual branch balancing is needed. The 2-inch standoff accommodates insulated duct wrap without compressing the insulation at the connection point.

Key Features

• Airtight adhesive mounting — bonds directly to round duct surface, no cutting required
• 5-inch diameter takeoff opening for standard round branch connections
• 2-inch standoff accommodates duct insulation at the connection point
• Integral damper allows airflow balancing at the branch without a separate fitting
• Designed for round pipe trunk and branch duct systems

Compatibility

Designed as an OEM-style replacement and new-installation fitting for round-pipe forced-air duct systems requiring airtight stick-on branch takeoffs with integral damper control.

Installation Notes

Installation is performed by licensed HVAC technicians or qualified duct installers. Shut down the air handling system and relieve any system pressure before attaching the takeoff. Ensure the duct surface is clean and dry before applying the adhesive seal to achieve a proper airtight bond. Follow local mechanical codes and SMACNA duct construction standards for branch connection requirements and air sealing.

Technical Specifications

• Takeoff Diameter: 5 inches
• Standoff Height: 2 inches
• Damper: Integral
• Mounting Type: Stick-On Adhesive
• Duct Type Compatibility: Round Pipe

Standard Information

• Brand: AIR FLOW PRODUCTS
• Manufacturer Part Number: 840-1-RATD20-000005