Southwark Metal WS20_3-1/4X10 Wall Stack Duct Collar

Product Description

The SOUTHWARK METAL WS20_3-1/4X10 is a straight-body wall stack duct collar designed for residential and light commercial HVAC duct systems. Fabricated from hot dip galvanized steel, this takeoff fitting connects a main trunk duct to a wall stack runout, measuring 3.25 inches x 10 inches to match standard wall stack openings. It meets ACCA and SMACNA standards, making it suitable for properly engineered forced-air distribution systems. HVAC sheet metal mechanics and duct installers use this collar to transition airflow from the main plenum or trunk into a wall cavity runout. The straight-body pattern allows for direct, low-restriction connections with no offset required.

This wall stack collar is used in forced-air heating and cooling duct systems where supply air is directed through a wall cavity to a floor or baseboard register. It fits residential new construction and retrofit applications where 3.25-inch x 10-inch wall stack duct is specified. The fitting is installed at the trunk duct penetration point and secured with standard sheet metal fasteners and duct sealant per SMACNA duct construction standards. Installers working to ACCA Manual D duct design specifications will find this collar sized for common wall stack runout configurations.

Key Features

• Hot dip galvanized steel construction resists corrosion in attic, crawlspace, and wall cavity environments
• Straight-body pattern provides direct trunk-to-wall-stack connection with no offset
• 3.25 inches x 10 inches nominal size matches standard residential wall stack duct dimensions
• Meets ACCA and SMACNA applicable standards for forced-air duct fabrication and installation
• Compatible with standard sheet metal screws and mastic or foil-tape sealing methods

Compatibility

Designed as an OEM-style sheet metal fitting for residential and light commercial forced-air duct systems using 3.25-inch x 10-inch wall stack duct runouts.

Installation Notes

Installation should be performed by a qualified HVAC sheet metal mechanic or duct installer. Shut down the air handling system and lock out the equipment before cutting into the trunk duct and fitting the collar. Secure with sheet metal screws and seal all joints with duct mastic or listed foil tape per SMACNA duct construction guidelines and local mechanical code requirements. Do not use duct tape in place of listed sealants where code prohibits it.

Technical Specifications

• Size: 3.25 inches x 10 inches
• Material: Hot Dip Galvanized Steel
• Body Pattern: Straight
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: WS20_3-1/4X10