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The SOUTHWARK METAL SPCON-24GA_20IN is a round spiral sheet metal connector coupling used to join sections of spiral duct in HVAC distribution systems. Fabricated from hot-dipped galvanized steel at 24 gauge, this fitting provides a rigid, corrosion-resistant connection for 20-inch diameter ductwork. The spiral seam construction maintains roundness and structural integrity under typical supply and return air pressures. HVAC sheet metal contractors and mechanical trades install this fitting during new construction, renovation, and system retrofit work where spiral round duct is the specified distribution method.
This connector is suited for residential and commercial HVAC applications where 20-inch round spiral duct is used for supply or return air distribution. It is designed to meet ACCA and SMACNA standards, making it appropriate for jobs requiring documented compliance with industry duct construction specifications. Typical use cases include air handling unit connections, trunk-to-branch transitions, and duct extensions in both low-rise and mid-rise construction.
Designed as an OEM-style replacement and standard connector fitting for 20-inch diameter round spiral duct systems fabricated and installed to ACCA and SMACNA specifications.
Installation is performed by licensed sheet metal contractors or HVAC mechanical trades. Before beginning work, shut down the air handling unit and relieve any system pressure. Fittings should be secured with sheet metal screws and sealed with UL 181-listed duct sealant or foil tape per SMACNA installation guidelines. Do not compress or distort the fitting during installation, as dimensional accuracy affects airflow and leakage ratings.
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