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The SOUTHWARK METAL 52_4X4X3 is a hot dip galvanized steel sheet metal flue wye designed for use in round pipe duct and flue systems. This tee-style branch fitting joins a 4-inch main run to a 3-inch branch outlet, allowing airflow or flue gas to be directed from a single 4-inch source to two paths. Constructed from hot dip galvanized steel, the fitting resists corrosion and holds up in the temperature ranges typical of residential and light commercial exhaust and ventilation applications. HVAC sheet metal mechanics and installers are the primary trade for this fitting.
This flue wye is suited for residential and light commercial HVAC duct systems, B-vent flue runs, and general sheet metal ventilation assemblies where a 4 x 4 x 3 inch branch configuration is required. The wye geometry provides a lower-resistance branch transition compared to a square tee, making it appropriate for both supply and exhaust duct layouts. It is fabricated to ACCA and SMACNA standards, which are the governing specifications for sheet metal duct and flue construction in the trade.
Designed as an OEM-style replacement and new-construction fitting for standard round galvanized sheet metal pipe and flue duct systems requiring a 4 x 4 x 3 inch wye branch.
Installation should be performed by a licensed sheet metal mechanic or HVAC technician in accordance with SMACNA and local mechanical code requirements. Shut down and de-energize any connected air handling or combustion equipment before working on duct or flue runs. Secure the fitting with sheet metal screws and seal joints with listed duct sealant or foil tape appropriate for the application temperature. Do not use this fitting in applications that exceed the material or coating ratings for hot dip galvanized steel.
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