Southwark Metal 84ST_1-1/2X7 Ductboard Collar Tap 7 in

Product Description

The SOUTHWARK METAL 84ST_1-1/2X7 is a sheet metal ductboard collar tap designed to create clean, secure branch takeoffs from ductboard duct systems. Constructed from hot dip galvanized steel, this collar tap provides corrosion resistance suited to the demands of forced-air HVAC distribution systems. The 7-inch size and 1-1/2-inch tab configuration allow for positive engagement with ductboard panels, creating a stable mechanical connection at the branch opening. HVAC installers and sheet metal mechanics use this type of fitting when transitioning from a ductboard trunk to a round branch run, maintaining system integrity and minimizing air leakage at the tap point.

This collar tap is intended for use in residential and light commercial forced-air HVAC installations where ductboard is used as the primary duct system material. It fits 7-inch round branch applications and is appropriate for new construction and retrofit projects where ductboard trunk lines require branch connections. The 1-1/2-inch tab secures the collar to the ductboard face, providing a firm mechanical seat before sealing.

Key Features

• Hot dip galvanized steel construction for corrosion resistance in HVAC environments
• 7-inch collar size for standard round branch duct connections
• 1-1/2-inch tab design for positive mechanical engagement with ductboard panels
• Meets ACCA and SMACNA applicable standards for sheet metal ductwork fittings
• Compatible with ductboard trunk-to-round-branch transition installations

Compatibility

Designed as an OEM-style sheet metal fitting for use with ductboard duct systems requiring 7-inch round branch collar tap connections in residential and light commercial forced-air HVAC applications.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified sheet metal mechanic in accordance with SMACNA ductwork installation standards and local mechanical codes. Shut down and de-energize the air handling system before cutting into any duct panel or making branch connections. The tab should be fully seated against the ductboard face and all joints sealed with approved duct mastic or UL-listed foil tape to meet air-leakage requirements. Avoid over-driving or bending the tab during installation, as this can compromise the seal at the collar-to-ductboard interface.

Technical Specifications

• Material: Hot Dip Galvanized Steel
• Collar Size: 7 inches
• Tab Size: 1-1/2 inches
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 84ST_1-1/2X7