Southwark Metal 55_3IN Duct Tee End Cap 3 in Crimped

Product Description

The SOUTHWARK METAL 55_3IN is a crimped sheet metal duct tee end cap designed to terminate or cap off 3-inch diameter tee fittings in low-pressure forced-air duct systems. Fabricated from hot dip galvanized steel, this end cap delivers corrosion resistance suited for residential and light commercial HVAC ductwork. The crimped end allows for a friction-fit connection to standard round duct tee branches, making installation straightforward for sheet metal installers and HVAC technicians. It meets ACCA and SMACNA standards for duct fabrication, ensuring compliance with common installation specifications.

This end cap is used wherever a branch opening on a round duct tee must be sealed or temporarily closed off during system installation, balancing, or reconfiguration. Typical applications include residential forced-air heating and cooling systems, light commercial air distribution, and HVAC retrofit work where unused tee ports need to be capped. It is appropriate for trunk-and-branch and extended-plenum duct layouts using 3-inch round duct.

Key Features

• 3-inch diameter fits standard round duct tee branch openings
• Hot dip galvanized steel construction resists corrosion in duct environments
• Crimped end enables friction-fit installation without additional fasteners
• Meets ACCA and SMACNA applicable standards for duct system components
• Suitable for residential and light commercial forced-air HVAC ductwork

Compatibility

Designed as an OEM-style sheet metal fitting for use with 3-inch diameter round duct tee fittings in standard low-pressure forced-air HVAC duct systems built to ACCA and SMACNA specifications.

Installation Notes

Installation is typically performed by licensed HVAC technicians or sheet metal workers. Power down the air handling unit and close the system dampers before working inside active ductwork. The crimped end should be inserted into the tee branch opening and secured with sheet metal screws or foil-backed tape in accordance with SMACNA duct construction standards. Do not use this cap on duct systems operating above the pressure class for which the fitting was fabricated.

Technical Specifications

• Size: 3 inches Diameter
• Material: Hot Dip Galvanized Steel
• Connection Type: Crimp
• Applicable Standards: ACCA, SMACNA

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 55_3IN