Flexible Technologies 4MC Metallic Flex Connector 4 in X 25 Ft

Product Description

The FLEXIBLE TECHNOLOGIES 4MC is a metallic uninsulated flexible duct connector designed for HVAC air distribution systems. Measuring 4 inches in diameter and 25 feet in length, this connector bridges equipment connections and transitions where rigid ductwork is impractical. Its metallic construction provides durability and resistance to crushing, making it suitable for exposed or semi-exposed installations. HVAC technicians and sheet metal contractors install this connector in both new construction and retrofit applications where flexible, uninsulated duct runs are required.

This connector is used in residential and light commercial HVAC systems to connect air handlers, furnaces, and branch takeoffs to supply or return grilles. The uninsulated design suits unconditioned spaces where a separate insulation wrap will be applied or where code does not require factory-applied insulation. At 25 feet per roll, a single unit covers most standard duct runs without splicing.

Key Features

• 4-inch diameter fits standard HVAC collar and boot connections
• 25-foot length provides sufficient run for most residential duct branch applications
• Metallic construction resists crushing and maintains airflow cross-section
• Uninsulated design allows field-applied insulation wrap per local code requirements
• Part of the 06 Series flexible connector product line

Compatibility

Designed as an OEM-style replacement and standard-fit connector for 4-inch HVAC duct branch connections in residential and light commercial air distribution systems.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified sheet metal contractor in accordance with local mechanical codes and SMACNA guidelines. Power down the air handling unit and shut off any associated heating equipment before making duct connections. Secure each end of the connector with an approved draw band or sheet metal screw to prevent pullout. Do not compress or sharply bend the connector, as restriction reduces airflow and can increase static pressure drop across the system.

Technical Specifications

• Diameter: 4 inches
• Length: 25 feet
• Insulation: Uninsulated
• Construction: Metallic
• Series: 06 Series

Standard Information

• Brand: FLEXIBLE TECHNOLOGIES
• Manufacturer Part Number: 4MC