Southwark Metal 55NC_10IN Duct Tee End Cap 10 Inch

Product Description

The SOUTHWARK METAL 55NC_10IN is a no-crimp sheet metal duct tee end cap designed to close off the open end of a tee fitting in a forced-air duct system. Constructed from hot-dip galvanized steel, it provides durable corrosion resistance in both supply and return air applications. The 10-inch diameter plain end fits standard round duct tee branch openings without requiring a crimped insertion end, simplifying installation. HVAC technicians and sheet metal contractors use this cap when a tee branch is not needed for airflow or must be sealed during phased construction.

This end cap is suited for residential and light commercial HVAC ductwork where round sheet metal tees are present. It is typically installed in forced-air heating and cooling systems using galvanized steel duct components built to SMACNA and ACCA standards. Common scenarios include capping an unused branch on an existing tee during system modification, balancing projects, or new construction rough-in where a branch run has not yet been connected.

Key Features

• No-crimp plain end design allows direct fit over tee branch without insertion crimping
• Hot-dip galvanized steel construction resists corrosion in mechanical spaces and unconditioned areas
• 10-inch diameter fits standard round duct tee branch openings
• Meets SMACNA and ACCA applicable standards for sheet metal duct components
• Plain cap profile keeps the sealed branch flush and secure

Compatibility

Designed as an OEM-style sheet metal fitting for use with standard 10-inch round galvanized steel duct tee fittings in residential and light commercial forced-air HVAC systems built to SMACNA standards.

Installation Notes

Installation is typically performed by licensed HVAC technicians or sheet metal contractors. The air handling system should be powered down and the air handler or furnace shut off before accessing ductwork. Secure the cap with sheet metal screws and seal the perimeter with UL 181-listed duct tape or mastic sealant to prevent air leakage. Follow applicable local mechanical codes and SMACNA duct construction standards during installation.

Technical Specifications

• Diameter: 10 inches
• Material: Hot Dip Galvanized Steel
• Type: No Crimp
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 55NC_10IN