SpiroFlex pipe connector 120 mm diameter SpiroFlex 120Z

SpiroFlex pipe connector 120 mm diameter SpiroFlex 120Z is a mechanical fitting designed for joining or extending round ventilation and air-conditioning ducts with a nominal diameter of 120 mm. Manufactured for use in HVAC systems, the connector provides a straightforward method to assemble duct runs, perform repairs or modify layouts in residential and light commercial ventilation installations. Its round profile matches standard circular ducts and supports continuous airflow when properly installed.

Advantages

The SpiroFlex 120Z connector is built to provide a secure, low-profile joint between 120 mm round ducts, reducing air leakage at connection points. Its construction allows for quick mechanical coupling without the need for specialized tools, enabling faster installation and maintenance. The simple geometry ensures compatibility with standard round ductwork, and the durable material maintains shape and alignment under typical HVAC operating conditions.

Suitable for

• Connecting sections of 120 mm round ventilation ductwork
• Extending existing round HVAC ducts during renovation or system modification
• Repairing damaged or corroded segments of circular duct runs
• Temporary or permanent joins in residential and small commercial ventilation systems

Key specifications

• Nominal diameter: 120 mm
• Shape: round connector for circular ducts
• Function: mechanical coupling for joining or extending duct sections
• Compatibility: designed for standard 120 mm round ventilation and air-conditioning ducts
• Typical applications: ventilation, exhaust, and air distribution systems

How to use

Align the ends of the two duct sections to be joined so that their edges are flush. Insert the SpiroFlex 120Z connector into the mating ends, ensuring an even overlap and proper alignment of the circular profile. Secure the connection following industry practice for mechanical duct couplings — this may include tightening clamps, applying screws through accessible flanges, or using approved sealing tape or mastics on the joint to minimize air leakage. Verify the joint is properly seated and does not obstruct airflow before completing insulation or enclosing the duct run.

Usage recommendations

For best performance, inspect mating duct ends for burrs, deformation or contamination and prepare them by trimming or cleaning as needed. Use compatible clamps or fasteners rated for HVAC applications and consider applying a suitable duct sealant or foil tape to improve airtightness. Ensure the connector is used within the intended diameter and application scope and follow local ventilation codes and installer guidelines.