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The Southwark Metal 58_9X7 is a 3-piece sheet metal pipe reducer designed to transition round duct from a 9-inch diameter to a 7-inch diameter. Fabricated from hot dip galvanized steel, this reducer delivers corrosion resistance suited for residential and light commercial HVAC duct systems. The no-crimp design means the fitting ships without a pre-formed crimp end, which is standard practice for certain field-assembled duct runs where the installer crimps on-site or uses alternative joining methods. It meets ACCA and SMACNA standards for sheet metal ductwork fabrication.
This reducer is used in forced-air HVAC systems wherever a main trunk or branch run needs to step down from 9-inch to 7-inch round duct. Typical applications include residential trunk-and-branch layouts, commercial light-duty air distribution systems, and retrofit duct modifications where airflow needs to be directed into a smaller-diameter run. Sheet metal contractors and HVAC installers are the primary trades that work with this fitting.
Designed as an OEM-style replacement or new-installation fitting for round sheet metal duct systems using 9-inch and 7-inch diameter connections, per SMACNA and ACCA duct construction standards.
Sheet metal contractors and HVAC technicians install this reducer as part of a round duct system. Shut down the air handling unit and disconnect power before modifying any section of an active duct run. Secure the fitting with sheet metal screws and seal all joints with mastic sealant or UL 181-listed foil tape per SMACNA installation guidelines. Because this fitting ships without a crimp, field-crimp the appropriate end using a hand crimper before inserting into the adjoining duct section if the installation requires a slip joint.
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