Air Flow Products EC03 Tee End Cap 3 Inches

Product Description

The AIR FLOW PRODUCTS EC03 is a tee end cap designed to terminate or close off the open end of a 3-inch tee fitting in a duct or piping distribution system. This component provides a clean, secure closure that prevents airflow leakage and maintains system pressure at unused tee outlets. It is commonly installed by HVAC technicians and plumbers during new construction or retrofit work where a tee branch is not yet connected or is being permanently capped off. The EC03 is a straightforward mechanical component suited for residential and light commercial applications.

The EC03 fits 3-inch tee fittings and is appropriate for use in branch duct systems, piping networks, or distribution manifolds where an unused outlet requires a reliable end cap. The product designation includes a reference to series 88, which may indicate a specific fitting family or profile within the AIR FLOW PRODUCTS line. Installers working on duct systems, drain lines, or similar distribution runs will find this cap a direct solution for closing unused branch ports.

Key Features

• Closes off unused 3-inch tee outlets to prevent leakage or air loss
• Designed for use with series 88 tee fittings from AIR FLOW PRODUCTS
• Simple, tool-minimal installation for fast branch termination
• Maintains system integrity at unconnected branch points

Compatibility

Designed as an OEM-style end cap for 3-inch tee fittings, consistent with the AIR FLOW PRODUCTS series 88 fitting family as referenced in the product designation.

Installation Notes

Installation is typically performed by a licensed HVAC technician or plumber depending on the application. Before installing or removing any end cap, shut down the associated system and verify that pressure has been relieved. Ensure the mating tee fitting is clean and free of debris before seating the cap. Follow applicable local codes, including SMACNA standards for duct systems or IPC guidelines for piping applications, as appropriate to the installation context.

Technical Specifications

• Size: 3 inches
• Fitting Series: 88
• Component Type: Tee End Cap

Standard Information

• Brand: AIR FLOW PRODUCTS
• Manufacturer Part Number: EC03