Southwark Metal 58_8X4 Sheet Metal Pipe Reducer 8x4 Inch

Product Description

The SOUTHWARK METAL 58_8X4 is a 3-piece sheet metal pipe reducer designed to transition round duct from an 8-inch diameter down to a 4-inch diameter in forced-air HVAC duct systems. Fabricated from hot dip galvanized steel, it provides corrosion resistance suited for both supply and return duct applications. The no-crimp design means the installer supplies any field crimp as needed during assembly. This reducer is built to ACCA and SMACNA standards, making it a code-compliant choice for residential and light commercial ductwork installations performed by licensed HVAC mechanics and sheet metal contractors.

This reducer is used in residential and light commercial HVAC duct systems wherever a straight-run transition from 8-inch to 4-inch round duct is required. Common install scenarios include trunk-to-branch transitions, air handler supply plenums, and rooftop unit distribution systems. The 3-piece construction accommodates field assembly and is compatible with standard round snap-lock and spiral duct of the corresponding diameters.

Key Features

• Hot dip galvanized steel construction for corrosion resistance in HVAC duct environments
• 3-piece design supports field assembly and replacement
• No crimp supplied — installer applies field crimp as required by layout
• Transitions 8-inch diameter duct down to 4-inch diameter duct in a single fitting
• Meets ACCA and SMACNA applicable standards for duct fabrication and installation

Compatibility

Designed as an OEM-style replacement and standard fitting for residential and light commercial round duct systems requiring an 8-inch to 4-inch concentric reduction.

Installation Notes

Installation is performed by licensed HVAC technicians or sheet metal contractors following SMACNA duct construction standards and local mechanical codes. Shut down and lock out the air handling system before cutting into existing ductwork or removing fittings. Secure all duct connections with sheet metal screws and seal joints with UL 181-listed mastic or foil tape per applicable code. Do not apply field crimp to both ends simultaneously before confirming alignment with adjacent duct sections.

Technical Specifications

• Larger End Size: 8 inches diameter
• Smaller End Size: 4 inches diameter
• Material: Hot Dip Galvanized Steel
• Type: 3-Piece
• Crimp Supplied: No
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 58_8X4