Southwark Metal 90-30GA_4IN Round Duct Elbow 90 Degree 4 in

Product Description

The SOUTHWARK METAL 90-30GA_4IN is a 90-degree round sheet metal duct elbow fabricated from hot dip galvanized steel at 30 gauge material thickness. Designed for use in low-pressure HVAC ductwork systems, this elbow redirects airflow at a right angle within round duct runs. The 4-inch diameter inlet and outlet dimensions make it a standard fit for residential and light commercial supply and return branches. Licensed HVAC technicians and sheet metal workers install this fitting as part of forced-air distribution systems where direction changes are required. Compliance with ACCA and SMACNA standards confirms it meets recognized industry fabrication and performance criteria.

This elbow is suited for residential and light commercial forced-air HVAC duct systems requiring a 90-degree directional change in 4-inch round ductwork. Typical applications include supply air branch takeoffs, return air connections, and trunk-to-branch transitions. It is commonly installed in attic, crawlspace, basement, and in-wall duct runs where space constraints or layout requirements demand a right-angle turn. Sheet metal contractors and HVAC technicians working on new construction or retrofit duct systems will find this a direct-fit component for standard 4-inch round duct configurations.

Key Features

• 90-degree angle for right-angle directional changes in round duct systems
• Hot dip galvanized steel construction provides corrosion resistance in HVAC environments
• 30 gauge material thickness meets SMACNA and ACCA fabrication standards
• 4-inch diameter on both inlet and outlet for consistent round duct sizing
• Meets ACCA and SMACNA applicable standards for duct system components

Compatibility

Designed as an OEM-style sheet metal fitting for use with standard 4-inch round ductwork in residential and light commercial forced-air HVAC systems built to SMACNA and ACCA specifications.

Installation Notes

Installation should be performed by a licensed HVAC technician or sheet metal worker in accordance with SMACNA duct construction standards and local mechanical codes. Shut down the air handling system before disconnecting or modifying any duct sections. Sheet metal screws and foil-backed mastic or UL 181-listed duct tape are typically used to secure and seal the elbow at both connections. Wear appropriate cut-resistant gloves when handling sheet metal edges.

Technical Specifications

• Angle: 90 degrees
• Type: Round
• Size A (Inlet Diameter): 4 inches
• Size B (Outlet Diameter): 4 inches
• Material: Hot Dip Galvanized Steel
• Material Thickness: 30 Gauge
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 90-30GA_4IN