Southwark Metal SP90-24GA_18IN Spiral Elbow 90 Degree 18 in

Product Description

The SOUTHWARK METAL SP90-24GA_18IN is a 90-degree spiral round sheet metal elbow fabricated from hot-dip galvanized steel at 24 gauge. It is designed for use in low-pressure ducted HVAC air distribution systems where a directional change in round spiral duct is required. The 18-inch diameter matches both the inlet and outlet, making it a symmetrical fitting with no reduction. Licensed HVAC sheet metal contractors and ductwork installers are the primary installers of this fitting in commercial and residential mechanical systems.

This elbow is suited for round spiral duct systems in commercial and residential HVAC installations. It is used wherever a 90-degree change of direction is needed in an 18-inch round duct run, such as in rooftop unit distribution, air handling unit supply trunks, or exhaust systems. The hot-dip galvanized finish provides corrosion resistance appropriate for conditioned air, ventilation, and exhaust applications. It meets ACCA and SMACNA applicable standards, making it appropriate for code-compliant ductwork installations.

Key Features

• 90-degree turn angle for directional change in round spiral duct runs
• 18-inch inlet and outlet diameter — no reduction, symmetrical fitting
• 24-gauge hot-dip galvanized steel construction for corrosion resistance
• Spiral round form factor for compatibility with standard spiral duct systems
• Meets ACCA and SMACNA standards for code-compliant duct fabrication

Compatibility

Designed for use with 18-inch round spiral duct systems meeting ACCA and SMACNA installation standards. Suitable for low-pressure supply, return, and exhaust air distribution applications.

Installation Notes

Installation is performed by licensed sheet metal contractors or HVAC installers in accordance with SMACNA duct construction standards and applicable mechanical codes. The duct system should be fully depressurized and the air handling equipment shut down before connecting or sealing fittings. Joints should be secured with sheet metal screws and sealed with UL 181-rated mastic or foil tape as required by local code. Handle cut edges carefully — 24-gauge galvanized steel edges are sharp and require appropriate PPE.

Technical Specifications

• Angle: 90 degrees
• Diameter (Inlet): 18 inches
• Diameter (Outlet): 18 inches
• Material Thickness: 24 gauge
• Material: Hot-dip galvanized steel
• Type: Spiral round elbow
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: SP90-24GA_18IN