Flexible reducing snap-fit connector AKCES COFLEX DCOFLEX-305, Ø40→50→40 mm, adjustable length 350–580 mm

AKCES COFLEX DCOFLEX-305 is a flexible reducing snap-fit connector for ventilation and pipe systems, featuring stepped diameters 40→50→40 mm and an adjustable length from 350 to 580 mm. The elastic construction provides alignment between mismatched pipe sections and reduces transmission of vibration and noise. The connector is designed for quick, tool-free snap-fit assembly to create a sealed joint suitable for HVAC and ducting installations.

Advantages

The flexible material and stepped diameter design enable adaptation between 40 mm and 50 mm ducts while maintaining a continuous airflow path. Adjustable length allows installers to bridge variable distances without cutting or adding rigid sections. The snap-fit ends provide rapid installation and a reliable mechanical seal, and the elasticity helps absorb minor misalignments and reduce vibration transfer.

Suitable for

• Connecting ventilation ducts with diameters 40 mm and 50 mm
• Flexible transitions in household and commercial HVAC systems
• Retrofit or repair work where pipe alignment is imperfect
• Noise and vibration reduction between fan units and duct runs

Key specifications

• Stepped diameters: 40 mm → 50 mm → 40 mm
• Adjustable length: 350–580 mm
• Flexible, elastic construction for vibration absorption
• Snap-fit connection for tool-free assembly
• Suitable for air handling in ventilation and duct systems

How to use

Select the connector orientation matching the duct layout, compress the snap-fit ends and push them onto the corresponding duct sections until an audible click confirms engagement. Adjust the overall length by extending or compressing the central flexible section to achieve the required span between connection points. Ensure both ends are fully seated and the stepped diameters align with the mating ducts to maintain an airtight path.

Usage recommendations

Inspect mating duct ends for sharp edges or debris before installation, and avoid overextending beyond the specified 350–580 mm range. For improved sealing in higher-pressure systems, consider adding compatible clamps or tape at the joints while noting that the connector is primarily designed for standard ventilation pressures. Periodically check connections for signs of wear or loosening, especially in installations subject to significant vibration.

AKCES COFLEX DCOFLEX-305 is suitable for professionals and DIY installers needing a compact, adjustable connector to join mixed-diameter ducts quickly and with reduced vibration transfer.