6" to 4" Inch Galvanized Steel Round Duct Reducer - Pipe Fitting Increaser Reducer - Drain, Waste and Vent Conduit Transition Adapter - Metal Tube Reducing Coupling

This round ducting adapter is designed to seamlessly connect 150mm (6") ducting to 100mm (4") systems, making it easy to adapt between different ventilation sizes in one simple step. Featuring a 150mm male to 100mm male configuration, it provides a secure, efficient transition for a wide range of air-movement applications. Manufactured from durable galvanized steel, this reducer offers excellent resistance to corrosion, heat, and everyday wear — ensuring long-lasting performance in both residential and commercial environments. Its rigid construction supports stable airflow while maintaining structural integrity, even in demanding setups. Ideal for HVAC systems, bathroom extractors, kitchen range hoods, tumble dryers, inline fans, hydroponic grow rooms, and general ventilation projects, this versatile connector works with both solid and flexible ducts. Whether you’re upgrading an existing system or installing new equipment, it enables fast, reliable connections between mismatched duct sizes. Suitable for DIY users and professional installers alike, this duct reducer provides a practical, all-in-one solution for adapting airflow systems across kitchens, bathrooms, offices, workshops, and commercial spaces — delivering dependable ventilation wherever it’s needed.

• Round Ducting Adapter: Converts 6" (5.90") to 4" (3.93") / 150mm Male to 100mm Male Sizes
• Compatible with HVAC systems, bathroom fans, inline ventilators, range hoods, dryers, hydroponics setups, kitchens, or any other residential, commercial, or office environment.
• Robust galvanized steel ducting, ideal for both DIY enthusiasts and professional tradespeople.
• Versatile and durable, this all-in-one duct reducer or increaser facilitates seamless connections between different solid or flexible ducts, ventilators, or equipment, accommodating varying sizes and configurations.
• Tailored for venting applications such as tumble dryers, bathrooms, extractor fans of any kind, hydroponic setups, in-line extract fans, and kitchen range hoods.