Eliminate the need for makeshift connections and unreliable tape. This precision-engineered 200mm to 150mm adapter provides a professional-grade, airtight transition between large-bore ducting diameters.
The 200mm (8") and 150mm (6") standards represent the backbone of large-scale airflow systems—where the 8-inch diameter serves as the primary extraction trunk, and the 6-inch diameter acts as the critical branch line for distribution. Whether you are managing a commercial kitchen canopy, an industrial dust collection circuit, or a large-scale hydroponic ventilation network, this reducer provides the structural integrity required to connect main trunks to branch feeds without the risk of leaks or mechanical failure.
This model features a robust, truncated cone geometry with a 50mm reduction across a significant diameter. It is engineered with a consistent 4mm wall thickness throughout the entire profile, ensuring the part remains rigid under clamping pressure. The internal bore is optimized for smooth airflow, and both ends feature machined-style grooves to provide a positive mechanical seat for hose clamps.
✅ Key Engineering Advantages
- Uniform 4mm Structural Walls: Engineered with a consistent 4mm thickness across the entire cone, ensuring the 200mm base remains stable even under maximum clamp tension.
- Integrated Dual-End Clamping Channels: Features dedicated grooves at both the 200mm (8") and 150mm (6") interfaces, preventing hose rotation and ensuring a high-pressure seal.
- Global Standard Compatibility: Designed for the 8-inch to 6-inch transition, making it compatible with both Imperial and Metric-standard industrial ducting.
- Optimized Internal Airflow: The smooth, continuous internal profile minimizes turbulence and promotes efficient pressure recovery as air moves from the 8-inch trunk to the 6-inch branch.
- Industrial-Grade Design: Specifically modeled for high-demand environments, such as commercial extraction and heavy-duty workshop ventilation.
- Reversible Geometry: The symmetrical design allows the part to function as either a 200→150mm reducer or a 150→200mm expander.
- Support-Free Printing: The geometry is optimized for FDM printing, requiring no support structures when printed in the correct orientation.
🔧 Primary Applications
- Commercial Kitchen Ventilation: Transitioning 8-inch canopy mains to 6-inch branch connections.
- Industrial Workshop Extraction: Connecting 200mm main collectors to 150mm/6-inch tool extraction hoses.
- Large-Scale Indoor Farming: Managing airflow from 8-inch trunk lines to 6-inch distribution feeds in grow environments.
- Inline Fan Integration: Adapating 6-inch/150mm inline fans to 200mm main extraction trunks.
- Commercial HVAC Systems: Reducing 8-inch supply plenums to 6-inch distribution branches.
- Centralized Air Distribution: Stepping down 200mm main ducts to 150mm branch runs in residential/commercial HVAC.
- Marine Ventilation: Connecting 8-inch main lines to 6-inch auxiliary systems in marine environments.
📦 Package Contents
- Digital Files: High-fidelity 3D models optimized for industrial-grade printing.
🛠️ Technical Specifications
- Material Compatibility: Recommended for PETG, ASA, or ABS for maximum durability.
- Print Orientation: Flat on the build plate (200mm face down).
- Wall Thickness: Optimized for high-strength, airtight performance.
⚠️ Printing Recommendations
- Material Choice: For industrial or high-heat environments, use ASA or PETG.
- Print Settings: High-density infill and increased wall counts are recommended to ensure the part is completely airtight.
- Structural Integrity: Ensure proper bed adhesion, as the 200mm footprint requires a stable build plate.

































