Reducer (pipe reducer) EUROPLAST VA80 — concentric reducer D80→100→125→150 for plastic ventilation and ducting

EUROPLAST VA80 concentric reducer is a multi-step pipe reducer designed to connect circular plastic ventilation ducts with nominal diameters 80, 100, 125 and 150 mm. Intended for air-distribution systems, the reducer provides smooth transitions between duct sizes in a single molded component, simplifying routing and reducing the need for additional adapters when installing or modifying ventilation lines in residential and commercial HVAC applications.

Advantages

The concentric design ensures axial alignment of ducts for stable airflow and reduced turbulence. A single-piece construction reduces assembly time and potential leak points compared with multiple separate adapters. Compatible with standard plastic duct fittings, the reducer enables compact installations and clearer duct paths in confined spaces. The stepped design permits successive connection to larger diameter ducts without intermediate couplings, helping to maintain system integrity and save installation materials.

Suitable for

• Connecting and transitioning between circular plastic ventilation ducts of 80, 100, 125 and 150 mm
• Residential and small commercial HVAC systems
• Kitchen, bathroom and utility room exhaust and supply lines
• Retrofit projects where space or access is limited

Key specifications

• Type: concentric multi-step pipe reducer for circular ducts
• Compatible duct diameters: 80 mm → 100 mm → 125 mm → 150 mm
• Material: durable plastic suitable for ventilation applications
• Design: single-piece stepped profile for sequential size transitions
• Connection: push-fit or slip-fit with standard circular plastic ducts (compatibility depends on duct cuff type)

How to use

Select the appropriate step corresponding to the smaller and larger duct diameters you need to join. Prepare duct ends by ensuring they are clean, free of burrs and properly aligned. Insert the duct ends onto the corresponding steps of the reducer, verifying a snug fit; use duct clamps or approved HVAC tape where necessary to secure connections and maintain airtightness. Ensure the reducer is aligned concentrically to preserve airflow characteristics, and avoid overstressing joints during installation to prevent deformation.

Usage recommendations

For best performance, inspect connections after initial operation and periodically during maintenance to confirm seals remain tight. Use compatible fastening methods and avoid sharp bends immediately adjacent to the reducer to minimize pressure losses. In systems with condensation risk, ensure appropriate drainage or insulation is provided upstream or downstream as required by the overall ventilation design.