Air Flow Products 840-1-RATD20-000006 Stick-on Takeoff

Product Description

The AIR FLOW PRODUCTS 840-1-RATD20-000006 is an airtight stick-on takeoff fitting designed for round duct pipe with an integrated damper. This fitting mounts directly to the main trunk line using an adhesive-backed gasket seal, creating a low-leak connection point for branch runs. The built-in damper allows airflow balancing at the takeoff without requiring a separate balancing collar. The 6-inch collar diameter and 2-inch standoff depth make this fitting suited for standard residential and light commercial forced-air duct systems. HVAC installers and sheet metal technicians use this fitting when running branch supplies off rectangular or oval main trunks.

This takeoff is intended for use in forced-air supply duct systems where airtight performance is required at branch connection points. The stick-on design speeds installation on trunk lines by eliminating the need to cut and fit a traditional collar boot. The integral damper lets technicians balance individual zones or supply runs during system commissioning without adding separate hardware. This fitting is appropriate for new construction duct rough-in as well as duct modification and branch addition work in retrofit applications.

Key Features

• Airtight adhesive-backed gasket seal eliminates air leakage at the trunk connection
• Integrated damper allows airflow balancing at the branch takeoff point
• 6-inch round collar accommodates standard 6-inch flex duct or hard pipe branch runs
• 2-inch standoff provides clearance between the trunk surface and the branch connection
• Stick-on installation reduces labor compared to traditional cut-in collar methods

Compatibility

Designed as an OEM-style replacement and new-installation fitting for residential and light commercial forced-air supply duct trunk lines accepting a 6-inch round branch takeoff.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified sheet metal installer. Power down the air handler or furnace at the disconnect before beginning any duct work. Clean and dry the trunk surface thoroughly before pressing the adhesive gasket to ensure a proper airtight seal. Follow local mechanical codes and SMACNA duct construction standards for sealing, support, and damper access requirements.

Technical Specifications

• Collar Diameter: 6 inches
• Standoff Depth: 2 inches
• Damper: Integrated
• Mount Type: Stick-On Adhesive Gasket
• Pipe Type: Round

Standard Information

• Brand: AIR FLOW PRODUCTS
• Manufacturer Part Number: 840-1-RATD20-000006