Southwark Metal 78_10X7X7 Sheet Metal Wye Branch 10x7x7

Product Description

The SOUTHWARK METAL 78_10X7X7 is a hot-dip galvanized steel sheet metal pipe wye branch fitting used in low-pressure residential and light commercial HVAC duct systems. This wye fitting splits a single duct run into two branches, allowing airflow to be distributed across two separate zones or supply runs from one trunk line. The main opening measures 10 inches, and both branch openings measure 7 inches. Fabricated from hot-dip galvanized steel, this fitting resists corrosion and meets the durability demands of installed ductwork. HVAC sheet metal contractors and duct installers work with this fitting during new construction and retrofit trunk-and-branch duct system builds.

This wye branch fitting is suited for supply or return air duct applications in forced-air HVAC systems. It is commonly used where a single 10-inch main duct trunk transitions into two 7-inch branch lines, directing conditioned air toward individual rooms or zones. The wye configuration produces lower pressure drop compared to sharp-angled tee fittings, making it a preferred choice in systems where airflow efficiency and balanced distribution are priorities. This fitting is appropriate for residential furnace and air handler duct systems as well as light commercial applications where SMACNA-compliant sheet metal ductwork is specified.

Key Features

• Hot-dip galvanized steel construction provides corrosion resistance for long-term duct system service
• Wye branch geometry reduces turbulence and pressure drop compared to standard tee fittings
• 10-inch main inlet with dual 7-inch branch outlets for balanced two-zone airflow distribution
• Fabricated to ACCA and SMACNA applicable standards for sheet metal duct fittings
• Compatible with standard sheet metal duct assembly methods including drive cleats and slip connectors

Compatibility

Designed as an ACCA- and SMACNA-compliant sheet metal wye branch fitting for use in low-pressure forced-air duct systems with a 10-inch main trunk and 7-inch branch runs.

Installation Notes

Installation of this fitting is performed by licensed sheet metal contractors or HVAC technicians. The air handling system or furnace must be powered off and the blower must be at a complete stop before making any duct modifications. Connections are typically secured using drive cleats, S-cleats, or sheet metal screws per SMACNA duct construction standards, and all joints should be sealed with UL 181-rated mastic or foil tape to meet energy code requirements. Verify that duct sizing and branch layout conform to ACCA Manual D residential duct design prior to installation.

Technical Specifications

• Material: Hot Dip Galvanized Steel
• Main Inlet Size: 10 inches
• Branch Outlet Size (each): 7 inches
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 78_10X7X7