Southwark Metal 78_6X4X4 Sheet Metal Pipe Wye Branch

Product Description

The SOUTHWARK METAL 78_6X4X4 is a hot-dip galvanized steel sheet metal pipe wye branch fitting used in residential and light commercial HVAC duct systems. This wye branch splits a 6-inch main duct into two 4-inch branch runs, allowing airflow to be distributed to multiple zones or outlets. Fabricated from hot-dip galvanized steel, it resists corrosion and meets the durability demands of long-term ductwork installations. HVAC sheet metal mechanics and duct fabricators install this fitting during new construction and retrofit projects where a clean, code-compliant branching connection is required.

This wye branch is suited for low-pressure residential and commercial forced-air duct systems where a 6-inch trunk transitions to dual 4-inch branch ducts. It is appropriate for supply air distribution applications in furnace, air handler, and rooftop unit installations. The fitting conforms to ACCA and SMACNA standards, making it compatible with systems designed and installed under those guidelines.

Key Features

• Hot-dip galvanized steel construction for corrosion resistance in duct applications
• 6 x 4 x 4 inch configuration for trunk-to-dual-branch air distribution
• Fabricated to ACCA and SMACNA applicable standards
• Suitable for supply air duct systems in residential and light commercial settings

Compatibility

Designed as an OEM-style sheet metal wye branch fitting for use in round duct systems with a 6-inch main inlet and dual 4-inch branch outlets, conforming to ACCA and SMACNA duct fabrication standards.

Installation Notes

This fitting is installed by licensed HVAC technicians or qualified sheet metal mechanics as part of a ducted forced-air distribution system. Disconnect and lock out power to the air handling equipment before making duct connections. Seal all joints with mastic sealant or UL 181-listed tape in accordance with applicable mechanical codes and SMACNA guidelines. Do not use this fitting in high-pressure duct systems beyond its designed pressure class.

Technical Specifications

• Material: Hot Dip Galvanized Steel
• Main Inlet Size: 6 inches
• Branch Outlet Size: 4 inches x 4 inches
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 78_6X4X4