Southwark Metal WS12_3-1/4X10-4X10 Duct Stack Head

Product Description

The SOUTHWARK METAL WS12_3-1/4X10-4X10 is a horizontal sheet metal duct stack head used to transition between a floor joist cavity or wall stack and a floor register boot in residential forced-air HVAC systems. Fabricated from hot dip galvanized steel, this fitting measures 3-1/4 x 10 inches on the stack inlet side and 4 x 10 inches on the outlet, making it a standard fit for floor supply applications. HVAC sheet metal installers and ductwork contractors use this component when stubbing up supply air from a crawl space or basement duct system into a living space floor register.

This stack head is suited for residential new construction and retrofit HVAC ductwork projects where a horizontal fitting is required to connect a rectangular stack to a floor boot or register. The horizontal orientation accommodates installations where the duct approaches the register from a side angle rather than straight up. It conforms to ACCA and SMACNA standards, making it appropriate for permitted residential and light commercial duct installations designed to Manual D or equivalent specifications.

Key Features

• Hot dip galvanized steel construction for corrosion resistance in crawl space and basement environments
• Horizontal orientation for side-approach duct stack connections
• 3-1/4 x 10 inch stack inlet to 4 x 10 inch outlet transition sizing
• Meets ACCA and SMACNA applicable standards for residential forced-air duct systems
• Standard sheet metal gauge construction for field modification and drive-and-slip assembly

Compatibility

Designed as an OEM-style replacement or new-construction fitting for residential forced-air supply duct systems using standard rectangular stack and floor boot configurations.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified sheet metal installer in accordance with SMACNA duct construction standards and local mechanical codes. Power down the air handler or furnace at the disconnect before working in the duct system. Secure all joints with sheet metal screws and UL 181-rated mastic or tape per local code requirements. Do not compress or deform the fitting during installation, as dimensional changes will reduce airflow and affect Manual D design performance.

Technical Specifications

• Stack Inlet Dimensions: 3-1/4 x 10 inches
• Outlet Dimensions: 4 x 10 inches
• Material: Hot Dip Galvanized Steel
• Orientation: Horizontal
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: WS12_3-1/4X10-4X10