Southwark Metal SP55-26GA_9IN Spiral Duct End Cap 26 Gauge 9 in

Product Description

The SOUTHWARK METAL SP55-26GA_9IN is a spiral round sheet metal duct end cap designed to seal the open end of a 9-inch diameter spiral duct. Fabricated from hot-dipped galvanized steel at 26 gauge, it provides a durable, corrosion-resistant closure for round HVAC ductwork. This cap is used to cap off an unused or terminal duct opening, preventing air leakage and maintaining system static pressure. HVAC sheet metal contractors and duct installers are the primary trades working with this component in both new construction and retrofit applications.

This end cap is suited for residential and light commercial HVAC duct systems using 9-inch spiral round ductwork. It fits directly over the duct end to provide a clean termination point where airflow needs to be blocked or a duct run is temporarily or permanently capped. Typical install scenarios include capping unused branch takeoffs, sealing duct ends during phased construction, or closing off decommissioned supply or return runs. It conforms to ACCA and SMACNA standards, making it appropriate for code-compliant duct system construction.

Key Features

• Hot-dipped galvanized steel construction resists corrosion in humid duct environments
• 26 gauge material thickness provides rigid, durable closure on spiral round duct
• Designed for 9-inch diameter spiral round ductwork
• Meets ACCA and SMACNA applicable standards for duct fabrication
• Provides a clean, airtight termination to reduce system air leakage

Compatibility

Designed as an OEM-style sheet metal fitting for use with 9-inch diameter spiral round duct systems built to ACCA and SMACNA standards in residential and light commercial HVAC applications.

Installation Notes

Installation is performed by licensed HVAC technicians or qualified sheet metal workers. Power down the air handling equipment and verify the system is depressurized before fitting the cap onto the duct end. Secure the cap with sheet metal screws and seal all joints with UL 181-listed duct sealant or foil tape in accordance with SMACNA guidelines. Follow local mechanical codes for proper duct closure requirements.

Technical Specifications

• Material: Hot Dipped Galvanized Steel
• Material Thickness: 26 Gauge
• Duct Diameter: 9 inches
• Duct Type: Spiral Round
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: SP55-26GA_9IN