Southwark Metal 142_4IN Duct Storm Collar 4 Inch

Product Description

The SOUTHWARK METAL 142_4IN is a 4-inch sheet metal duct storm collar designed to seal the annular gap where a flue pipe or vent pipe penetrates a roof deck. Fabricated from hot dip galvanized steel, this collar provides corrosion resistance in outdoor and rooftop exposure. It is a standard component in residential and light commercial HVAC and gas venting installations. HVAC technicians and sheet metal contractors install this collar as part of a compliant roof penetration assembly to prevent water intrusion around the duct or vent stack.

This storm collar is suited for use on 4-inch round duct or flue pipe roof penetrations in residential and light commercial construction. It fits standard B-vent, single-wall flue pipe, and round duct assemblies that exit through a sloped or flat roof. The collar is positioned above the roof flashing to direct water away from the penetration point, making it a common part of code-compliant venting systems built to ACCA and SMACNA standards.

Key Features

• Hot dip galvanized steel construction resists corrosion at rooftop and exterior exposures
• 4-inch size fits standard round duct and flue pipe roof penetrations
• Meets ACCA and SMACNA applicable standards for sheet metal duct and venting work
• Designed for use with roof flashing to form a weathertight penetration assembly
• Straightforward slip-on installation for new construction and replacement service calls

Compatibility

Designed as an OEM-style replacement and standard-fit component for 4-inch round duct and flue pipe roof penetration assemblies in residential and light commercial HVAC and venting systems.

Installation Notes

Installation is typically performed by a licensed HVAC technician or sheet metal contractor as part of a roof penetration assembly. The collar is slipped over the pipe above the roof flashing and sealed to prevent water infiltration. Shut down and lock out the connected HVAC or combustion appliance before working on any vent or flue penetration. Work should conform to SMACNA duct construction standards and applicable local mechanical codes.

Technical Specifications

• Size: 4 inches
• Material: Hot Dip Galvanized Steel
• Type: Storm Collar
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 142_4IN