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The SOUTHWARK METAL 1061444 is a wye branch fitting used in sheet metal ductwork systems to split or merge airflow at a three-way junction. Sized at 4 x 4 x 4 inches nominally, this fitting connects three 4-inch duct sections in a Y-configuration, allowing airflow to divide from a single trunk or combine from two branches into one. HVAC technicians and sheet metal workers install this type of fitting during new construction and retrofit applications where balanced air distribution is required across a duct layout.
This wye branch is suited for residential and light commercial forced-air HVAC systems. It is installed in supply or return duct runs where a clean, low-turbulence branch split is preferred over a standard tee. The symmetrical 4 x 4 x 4 inch configuration makes it a straightforward choice when all three duct legs share the same nominal diameter, simplifying layout and reducing the need for reducers or offsets at the junction point.
Designed as an OEM-style replacement or new-installation fitting for 4-inch nominal round or compatible sheet metal ductwork in residential and light commercial forced-air HVAC systems.
Installation is typically performed by licensed HVAC technicians or sheet metal workers. Power down the air handling unit and close any associated dampers before cutting into an existing duct run to install this fitting. Secure all joints with sheet metal screws and seal with UL 181-rated mastic or foil tape in accordance with local mechanical codes. Do not leave unsealed gaps at any connection point, as duct leakage reduces system efficiency and can affect pressure balance across branches.
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