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The Southwark Metal 58_12X6 is a 3-piece sheet metal pipe reducer designed to transition round duct from a 12-inch diameter down to a 6-inch diameter. Fabricated from hot dip galvanized steel, it delivers corrosion resistance appropriate for HVAC duct systems in both residential and light commercial applications. The no-crimp design means the fitting ships without a pre-formed crimp end, giving the installer full control over the connection method at rough-in. HVAC sheet metal contractors and duct installers are the primary trade installing this component during duct fabrication or system modification.
This reducer fits into trunk-and-branch duct layouts where a main supply trunk or plenum must step down to a smaller branch run. It is commonly installed at takeoff points in forced-air heating and cooling systems. The 3-piece construction allows the fitting to be assembled to the required taper geometry and is built to ACCA and SMACNA standards, making it compatible with installations that must meet those industry specifications for duct design and sheet metal fabrication.
Designed as an OEM-style replacement and new-construction fitting for round duct systems requiring a 12-inch to 6-inch concentric reduction in forced-air HVAC applications.
Installation is performed by licensed sheet metal mechanics or HVAC duct installers following SMACNA duct construction standards. Power down the air handler or furnace and confirm the system is de-energized before working on connected ductwork. Secure all joints with the appropriate fasteners and seal with mastic or listed duct tape per local mechanical code requirements. Do not use this fitting in applications outside its rated duct diameter range.
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