Air Flow Products EC04 Tee End Cap 4 Inches

Product Description

The AIR FLOW PRODUCTS EC04 is a tee end cap designed to terminate or close off the open end of a tee fitting in a duct or piping distribution system. At 4 inches, it provides a clean, sealed closure that prevents airflow bypass and maintains system integrity at unused branch openings. This fitting is a standard component in duct fabrication and distribution line assembly work, installed by HVAC technicians and sheet metal workers during new construction or retrofit projects.

The EC04 is suited for use in residential and light commercial HVAC distribution systems where a 4-inch tee fitting requires an end closure. It is typically installed at inactive branch taps or during staged system expansions where a branch will later be connected. The part number references an 88-series fitting family, indicating compatibility within that fitting line.

Key Features

• Closes off unused 4-inch tee branch openings to prevent air loss
• Designed for use within the 88-series fitting family
• Provides a flush, secure termination at open tee ends
• Suitable for residential and light commercial duct systems

Compatibility

Designed as a replacement or add-on end cap for 4-inch tee fittings within the AIR FLOW PRODUCTS 88-series fitting line.

Installation Notes

Installation is performed by qualified HVAC technicians or sheet metal workers. Power down and lock out the air handling system before working on duct branches to prevent accidental airflow or equipment startup. Secure the end cap according to the fitting manufacturer guidelines and verify the seal is airtight before restoring system operation. Follow local mechanical codes and SMACNA standards for duct fitting installation.

Technical Specifications

• Size: 4 inches
• Fitting Series: 88
• Type: Tee End Cap

Standard Information

• Brand: AIR FLOW PRODUCTS
• Manufacturer Part Number: EC04