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The SOUTHWARK METAL SL60-30GA_12IN is a 30-gauge hot-dip galvanized steel round duct pipe designed for low-pressure air distribution in residential and light commercial HVAC systems. At 12 inches in diameter and 60 inches in length, this snap-lock pipe provides a rigid, corrosion-resistant section for supply or return trunk and branch duct runs. Fabricated from hot-dip galvanized steel to ACCA and SMACNA standards, it delivers consistent dimensional accuracy and a secure mechanical joint. HVAC sheet metal installers and mechanical contractors use this pipe where a straight, full-length run is needed before transitioning to fittings or flex.
This round pipe is suited for forced-air heating and cooling duct systems in residential construction, light commercial buildouts, and mechanical room applications. The 12-inch diameter is common in main trunk runs and larger branch feeds off air handlers and furnaces. Its 60-inch length reduces the number of joints required in a straight run, which improves airflow efficiency and lowers installation labor. The snap-lock seam allows field assembly without additional fasteners at the longitudinal seam, speeding up rough-in work.
Designed as an OEM-style round duct section compatible with standard 12-inch SMACNA-compliant duct fittings, collars, and connectors used in forced-air HVAC distribution systems.
Installation should be performed by a licensed HVAC technician or sheet metal mechanic in accordance with SMACNA duct construction standards and local mechanical codes. Power down the air handling equipment before connecting or modifying any duct section. Secure all joints with sheet metal screws and seal with UL 181-listed mastic or foil tape as required by code. Support horizontal runs at intervals specified by SMACNA guidelines to prevent sagging and joint stress.
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