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The AIR FLOW PRODUCTS EC20 is a tee end cap designed to close off the open end of a tee fitting in a duct or piping distribution system. At 20 inches, this end cap provides a clean, secure termination point that prevents airflow bypass and maintains system integrity. It is installed by HVAC technicians and sheet metal mechanics working on air distribution systems where tee branches require capping during system layout, phased build-outs, or service isolation.
This end cap is suited for use in commercial and residential air distribution applications where a 20-inch tee fitting requires a closed-end termination. It is appropriate for new construction and retrofit installations where branch lines are temporarily or permanently sealed. The part number designation and sizing align with the AFP product family, making it a straightforward specification item for estimators and field techs alike.
Designed as an OEM-style end cap for 20-inch tee fittings in air distribution duct systems.
Installation is typically performed by a licensed HVAC technician or sheet metal mechanic. Before installing or removing any duct fitting, shut down and de-energize the air handling unit serving that branch. Secure the end cap according to the fitting manufacturer's connection method and verify the seal is airtight before returning the system to service.
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