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The SOUTHWARK METAL 58_7X5 is a 3-piece sheet metal pipe reducer designed to transition round duct from a 7-inch diameter to a 5-inch diameter in forced-air HVAC distribution systems. Fabricated from hot dip galvanized steel, it provides corrosion resistance suited for both supply and return duct applications. The no-crimp design allows connection with standard slip or drive fittings. HVAC installers and sheet metal mechanics use this fitting when downsizing trunk lines or branch runs during new construction or retrofit work. Compliance with ACCA and SMACNA standards ensures the fitting meets recognized ductwork fabrication requirements.
This reducer is used in residential and light commercial forced-air duct systems where a straight-line diameter reduction is required between round duct sections. It is a common component in trunk-and-branch layouts, equipment plenums, and branch take-off transitions. The 3-piece construction is typical of fabricated round fittings meeting SMACNA round duct standards. Licensed sheet metal mechanics and HVAC technicians install this fitting during rough-in or during system modification when airflow balancing requires a duct size change.
Designed as an OEM-style replacement or new-installation fitting for residential and light commercial round duct systems requiring a 7-inch to 5-inch inline reduction.
Installation should be performed by a licensed sheet metal mechanic or qualified HVAC technician following SMACNA duct construction standards and local mechanical codes. Secure all joints with sheet metal screws and seal with listed duct sealant or UL 181-rated tape as required by code. Ensure the duct system is depressurized and the air handling unit is powered down before working on connected ductwork. Do not compress or distort the fitting ends during installation, as this will affect the integrity of the slip or drive connections.
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