Seal-tite 1210-1810 Duct End Cap 18x10 Inches

Product Description

The SEAL-TITE 1210-1810 is an 18 x 10 inch duct end cap designed to close off the open ends of rectangular ductwork. End caps are used to terminate duct runs, seal unused duct openings, and maintain system pressure integrity in forced-air HVAC installations. This fitting prevents conditioned air from escaping at duct termination points, which directly supports static pressure balance across the supply or return system. HVAC technicians and sheet metal installers typically specify end caps during new construction duct fabrication or when modifying existing duct layouts.

This end cap fits rectangular duct measuring 18 x 10 inches and is suited for residential and light commercial forced-air systems. It is commonly installed during rough-in or system modification work where a duct branch or trunk line must be permanently or temporarily closed. Sheet metal contractors and HVAC installers use these fittings in both supply and return duct applications to maintain a sealed air distribution system.

Key Features

• Closes off rectangular duct openings to maintain system pressure
• Sized for 18 x 10 inch rectangular duct
• Suitable for supply or return duct termination
• Supports air-tight duct system integrity during new installs or modifications

Compatibility

Designed as an OEM-style replacement and standard fitment for 18 x 10 inch rectangular ductwork in residential and light commercial forced-air HVAC systems.

Installation Notes

Installation is performed by licensed HVAC technicians or sheet metal contractors. Power down the air handling unit before accessing ductwork, and verify the system is depressurized prior to fitting removal or installation. Secure the end cap with sheet metal screws and apply UL 181-rated mastic or foil tape at the seam to meet air leakage requirements per local mechanical codes. Do not leave duct ends unsealed during system operation.

Technical Specifications

• Width: 18 inches
• Height: 10 inches

Standard Information

• Brand: SEAL-TITE
• Manufacturer Part Number: 1210-1810