Southwark Metal 781288A Wye Branch Duct Fitting

Product Description

The SOUTHWARK METAL 781288A is a wye branch duct fitting designed to split a single duct run into two equal branch directions while maintaining airflow and air velocity. Measuring 12 inches by 8 inches by 8 inches, this fitting routes conditioned air from a trunk line into two separate branch runs without the pressure drop or turbulence associated with sharp tee fittings. It is a standard component in forced-air HVAC distribution systems and is typically installed by licensed HVAC technicians during system layout, renovation, or branch extension work.

This wye branch is suited for residential and light commercial forced-air duct systems where balanced airflow distribution is required. The symmetrical 8 inch by 8 inch branch outlets allow equal volumetric flow to two zones or diffusers served off a common 12 inch trunk. Installers use this fitting when adding or extending branch runs in sheet metal ductwork systems.

Key Features

• Splits one duct run into two equal branches without compromising air velocity
• 12 inches trunk inlet with dual 8 inch branch outlets for balanced flow distribution
• Wye geometry reduces turbulence compared to sharp tee branch fittings
• Standard sheet metal construction compatible with typical forced-air duct systems

Compatibility

Designed as an OEM-style sheet metal wye fitting for residential and light commercial forced-air HVAC ductwork systems with a 12 inch trunk and 8 inch branch connections.

Installation Notes

Installation should be performed by a licensed HVAC technician in accordance with SMACNA duct construction standards and local mechanical codes. Power down the air handling unit and verify the system is de-energized before cutting into or modifying any existing ductwork. Secure the fitting with sheet metal screws and seal all joints with UL-listed duct sealant or approved foil tape to prevent air leakage. Support the fitting adequately to avoid stress on adjacent duct sections.

Technical Specifications

• Inlet Size: 12 inches
• Branch Outlet Size: 8 inches x 8 inches
• Overall Dimensions: 12 inches x 8 inches x 8 inches
• Fitting Type: Wye Branch

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 781288A