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The SOUTHWARK METAL 142_6IN is a 6-inch hot dip galvanized steel storm collar designed to seal the penetration point where a duct or flue pipe passes through a roof or wall opening. It prevents water intrusion at the point of penetration, protecting the building envelope and maintaining system integrity. Fabricated from hot dip galvanized steel, this collar delivers corrosion resistance suited to exposed exterior installations. It is installed by HVAC technicians and sheet metal contractors as part of venting and duct penetration assemblies on residential and light commercial projects.
This storm collar is sized for 6-inch duct or pipe applications. It is commonly used where B-vent, single-wall flue pipe, or round sheet metal duct exits through a roof deck. The galvanized construction holds up to outdoor exposure and temperature cycling common in rooftop penetration environments. Southwark Metal manufactures this collar to conform to ACCA and SMACNA standards, making it appropriate for code-compliant duct and venting installations.
Designed as an OEM-style replacement and new-install storm collar for 6-inch round sheet metal duct and venting systems in residential and light commercial HVAC applications.
Installation is typically performed by a licensed HVAC technician or sheet metal contractor. Shut down the connected HVAC or venting system before working at the penetration point, and follow applicable SMACNA and local code requirements for duct and flue terminations. The collar should be sealed to the roof surface with appropriate flashing compound or caulk per local building code. Use proper fall protection when working at roof level.
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