Southwark Metal 28_3-1/4X10X5 Duct End Boot 3-1/4x10x5

Product Description

The SOUTHWARK METAL 28_3-1/4X10X5 is a sheet metal duct wallstack end boot designed to transition from a rectangular duct opening to a round collar in forced-air HVAC distribution systems. The rectangular inlet measures 3-1/4 inches by 10 inches, and the round outlet is 5 inches in diameter. Constructed from hot-dipped galvanized steel, this boot resists corrosion in both new construction and retrofit installations. It is used at the termination point of a wall stack or floor stack run, connecting the supply duct system to a register or grille. HVAC sheet metal installers and mechanical contractors are the primary trades who install this fitting.

This end boot is suited for residential and light commercial forced-air supply systems where a wallstack or perimeter-loop duct layout is used. It fits at the end of a rectangular stack run and accepts a 5-inch round collar for connection to a register boot or grille. Typical applications include new construction duct fabrication and duct replacement or modification projects where a rectangular-to-round transition is required at the wall or floor termination point.

Key Features

• Rectangular inlet: 3-1/4 inches by 10 inches for standard wallstack duct sizing
• Round outlet: 5-inch diameter for connection to standard round collar fittings
• Hot-dipped galvanized steel construction for corrosion resistance
• Rectangular-to-round transition profile designed for wallstack end terminations
• Meets ACCA and SMACNA applicable standards for sheet metal duct construction

Compatibility

Designed as an OEM-style sheet metal fitting for residential and light commercial forced-air supply duct systems utilizing standard 3-1/4 inch by 10 inch wallstack rectangular duct runs with a 5-inch round outlet collar.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified sheet metal installer following SMACNA duct construction standards and local mechanical codes. Power down the air handler or furnace at the disconnect before working on the duct system. Secure the boot to the duct run using sheet metal screws and seal all joints with UL 181-rated mastic or foil tape to maintain system pressure integrity. Do not substitute this fitting in applications where the duct sizing or collar diameter does not match the dimensions specified.

Technical Specifications

• Material: Hot-Dipped Galvanized Steel
• Inlet Size (Rectangular): 3-1/4 inches x 10 inches
• Outlet Size (Round): 5 inches diameter
• Type: Stack, Rectangular to Round End Boot
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 28_3-1/4X10X5