Southwark Metal 27_3-1/4X12X6 Duct Boot Wall Stack

Product Description

The SOUTHWARK METAL 27_3-1/4X12X6 is a straight wall stack sheet metal duct boot designed to transition from a 3-1/4 inch by 12 inch rectangular duct opening to a 6 inch round collar. Fabricated from hot dip galvanized steel, this boot resists corrosion in the humid, high-cycle environments common to residential and light commercial HVAC systems. It is installed by licensed HVAC technicians as part of a forced-air supply or return distribution system, typically where ductwork runs through wall cavities to serve floor or wall registers.

This straight wall stack boot is suited for new construction and retrofit applications where a rectangular trunk or branch duct must connect to a round 6 inch take-off or register collar within a wall stack configuration. The 3-1/4 inch by 12 inch face dimension is a standard size for high-velocity, space-constrained wall cavities in residential forced-air systems. Installers working to ACCA and SMACNA standards will find this fitting designed to meet those applicable guidelines.

Key Features

• Hot dip galvanized steel construction for corrosion resistance in humid duct environments
• Straight wall stack configuration for direct rectangular-to-round transitions
• 3-1/4 inch by 12 inch rectangular inlet matches standard wall cavity duct sizing
• 6 inch round collar outlet for connection to standard round duct or register boots
• Fabricated to ACCA and SMACNA applicable standards

Compatibility

Designed as an OEM-style replacement or new-installation fitting for residential and light commercial forced-air HVAC duct systems requiring a straight wall stack boot with a 3-1/4 inch by 12 inch rectangular opening and a 6 inch round outlet.

Installation Notes

Installation should be performed by a licensed HVAC technician in accordance with ACCA Manual D duct design guidelines and applicable SMACNA standards. Shut down the air handling unit and verify the system is de-pressurized before cutting into existing ductwork or connecting this fitting. Secure all seams with listed duct sealant or UL 181-rated tape per local mechanical code requirements. Do not compress or over-bend the collar during installation, as deformation can restrict airflow and affect system balance.

Technical Specifications

• Material: Hot Dip Galvanized Steel
• Inlet Size (Size A): 3.25 inches x 12 inches
• Outlet Size (Size B): 6 inch diameter
• Type: Wall Stack, Straight
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 27_3-1/4X12X6