Southwark Metal 58_12X8 Sheet Metal Pipe Reducer 12x8

Product Description

The SOUTHWARK METAL 58_12X8 is a 3-piece sheet metal pipe reducer designed to transition round duct from a 12-inch diameter down to an 8-inch diameter in forced-air HVAC systems. Fabricated from hot dip galvanized steel, this reducer delivers corrosion resistance suited for both supply and return duct applications. The no-crimp design means the larger end ships without a pre-formed crimp, giving the installer control over the connection method on the job. Licensed HVAC technicians and sheet metal contractors install this fitting during duct fabrication or system modification work.

This reducer fits standard residential and light commercial duct systems where airflow must be stepped down between main trunk lines and branch runs. It conforms to ACCA and SMACNA standards, making it appropriate for systems designed and installed to those widely adopted specifications. The 3-piece construction allows the reducer to maintain consistent geometry through the transition, supporting balanced airflow and minimizing turbulence at the step-down point. Typical applications include trunk-to-branch transitions and air handler duct connections in new construction and retrofit projects.

Key Features

• Transitions round duct from 12 inches to 8 inches in a single fitting
• Hot dip galvanized steel construction for corrosion resistance
• 3-piece design maintains consistent transition geometry
• No crimp on larger end — installer applies connection method in the field
• Meets ACCA and SMACNA applicable standards

Compatibility

Designed as an OEM-style replacement and new-installation fitting for standard round galvanized duct systems meeting ACCA and SMACNA specifications, with a 12-inch larger end and an 8-inch smaller end.

Installation Notes

Installation is performed by licensed sheet metal workers or HVAC technicians following SMACNA duct construction standards. Power down the air handling unit and lock out the system before working inside an active duct system. Secure all joints with the appropriate screws and approved duct sealant or mastic per local mechanical code requirements. Because no crimp is pre-formed on the larger end, the installer must prepare the connection using standard sheet metal hand tools before joining to adjacent duct sections.

Technical Specifications

• Larger End Size: 12 inches diameter
• Smaller End Size: 8 inches diameter
• Material: Hot Dip Galvanized Steel
• Type: 3-Piece
• Crimp Supplied: No
• Applicable Standard: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 58_12X8