Southwark Metal 11101810 Duct End Cap 18x10 in

Product Description

The SOUTHWARK METAL 11101810 is a duct end cap sized at 18 x 10 inches, designed to close off the open end of a rectangular sheet metal duct run. It creates a sealed termination point that prevents air bypass and maintains system static pressure at the end of a supply or return duct branch. HVAC installers and sheet metal contractors use this fitting during new construction duct fabrication and retrofit work where a duct run requires a clean, permanent closure.

This end cap is suited for low-pressure residential and light commercial forced-air HVAC systems. It fits standard 18 x 10 inch rectangular duct openings and is installed at trunk or branch duct terminations where airflow is intentionally stopped. It is a common component in sheet metal duct systems assembled in the field or fabricated in a shop environment.

Key Features

• Closes off 18 x 10 inch rectangular duct openings with a flush, sealed fit
• Prevents air bypass and maintains static pressure at duct termination points
• Compatible with standard sheet metal rectangular duct construction
• Suitable for use in supply and return duct systems

Compatibility

Designed as an OEM-style sheet metal fitting for standard 18 x 10 inch rectangular duct systems used in residential and light commercial forced-air HVAC applications.

Installation Notes

Installation is typically performed by licensed sheet metal workers or HVAC technicians. Power down the air handling unit and confirm the system is depressurized before fitting the end cap. Secure the cap using sheet metal screws and seal all seams with UL-listed foil tape or duct mastic per local mechanical code requirements. Follow applicable SMACNA standards for duct sealing and support.

Technical Specifications

• Duct Size: 18 x 10 inches
• Fitting Type: Rectangular Duct End Cap

Standard Information

• Brand: SOUTHWARK METAL
• Manufacturer Part Number: 11101810