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The SOUTHWARK METAL 52_7X4X3 is a round sheet metal duct flue wye tee joint used to split or combine airflow in residential and light commercial HVAC duct systems. Constructed from hot dipped galvanized steel, it measures 7 inches by 4 inches by 3 inches and provides a durable, corrosion-resistant connection point within supply or return duct runs. This fitting meets ACCA and SMACNA standards, making it a code-appropriate choice for sheet metal duct installations. HVAC technicians and sheet metal installers use this wye to branch duct runs cleanly while maintaining system airflow balance.
This wye tee joint is suited for residential forced-air heating and cooling systems as well as light commercial ductwork where round duct configurations are used. It is typically installed at branch take-offs in supply trunk runs, allowing one main duct to split into two outlet paths. The 7-inch main with 4-inch and 3-inch branches accommodates common residential duct sizing scenarios where balanced distribution across multiple zones or rooms is required.
Designed as an OEM-style sheet metal fitting compatible with standard round duct systems built to ACCA and SMACNA guidelines. Fits round duct connections sized at 7 inches, 4 inches, and 3 inches respectively at each port.
Installation should be performed by a licensed HVAC technician or qualified sheet metal installer in accordance with SMACNA duct construction standards and local mechanical codes. Shut down the air handler or furnace and verify the system is de-energized before making any duct modifications. Secure the fitting with sheet metal screws and seal all joints with UL 181-listed foil tape or mastic sealant to prevent air leakage. Do not use this fitting in flue gas exhaust applications that carry combustion byproducts unless the system is specifically designed and rated for that service.
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