airRoxy PVC duct connector 110/55 — airRoxy model 02-411 for ventilation systems

airRoxy PVC duct connector 110/55 (model 02-411) is a rigid ventilation fitting designed to join circular PVC ducts with nominal diameters of 110 mm and 55 mm. The component provides a stable transition between two commonly used duct sizes in air distribution and exhaust systems. Constructed from PVC, the connector is intended for use in residential and light commercial ventilation installations where compatibility with standard PVC ductwork and straightforward mechanical connection are required.

Advantages

The connector offers a durable PVC construction that resists corrosion and typical indoor moisture. Its rigid form ensures stable alignment and a secure fit between ducts of differing diameters, reducing the risk of air leakage when installed correctly. The simple geometry and smooth inner surface support unobstructed airflow and make cleaning or inspection easier compared with irregular transitions. The part is light-weight and compatible with standard PVC ventilation components, enabling quick installation and integration into existing duct networks.

Suitable for

• Transitioning between 110 mm and 55 mm circular PVC ducts in ventilation systems
• Residential supply and exhaust ductwork
• Light commercial ventilation installations with PVC ducting
• Retrofit projects where a size reduction or step-down coupling is needed

Key specifications

• Material: rigid PVC
• Connection type: circular stepped connector for two diameters
• Compatible duct diameters: 110 mm and 55 mm (nominal)
• Application: indoor ventilation air distribution and exhaust
• Surface: smooth inner bore to support airflow

How to use

Ensure that both mating duct ends are clean, free of burrs and dry before assembly. Align the 110 mm and 55 mm duct ends with the corresponding ends of the connector and push them fully into position until a snug fit is achieved. If required by the installation practice, apply an appropriate PVC-compatible adhesive or sealant to the joint surfaces to improve airtightness; follow the adhesive manufacturer’s instructions for curing time and compatibility. After installation, inspect the junction for gaps and perform an airflow test to verify correct sealing and alignment.

Usage recommendations

Use the connector only for ventilation air-handling in dry indoor environments or protected enclosures. Avoid prolonged exposure to direct sunlight or outdoor weathering without additional protection. For best performance, combine with matching smooth-wall PVC ducts and use approved adhesives or mechanical clamps where local codes require sealed connections.