VENTS UK 200mm Backdraught Shutter Connector – 8" Inline Non-Return Duct Valve for Extractor Fans & Cooker Hoods – Gravity Damper Flap for 200mm Rigid or Flexible Ventilation Ducting

• Stops Cold Air & Odours Entering Larger Vent Systems: The built-in gravity flap closes automatically when the fan switches off, helping to block drafts, insects and cooking or bathroom smells travelling back through the ducting.
• Supports Strong Airflow for High-Capacity Fans: Opens smoothly when the system is running, allowing powerful airflow to pass through without restricting extraction in kitchens, workshops, utility rooms or larger bathrooms.
• Designed for 200mm Ducting Systems: Fits standard 200mm rigid duct pipe or approx. 202mm flexible hose — ideal for bigger ventilation setups needing reliable non-return protection.
• Suitable for Heavy-Duty Home & Light Commercial Use: Perfect for large cooker hoods, high-airflow extractor fans, in-line fans, tumble dryers, hydroponic systems and general ventilation installations.
• Fast Push-Fit Setup: Durable, lightweight plastic inserts directly into round ducting with no special tools required — suitable for DIY users and professional installers.

VENTS UK 200mm backdraught shutter connector prevents cold air and odours from flowing back through large ventilation systems. Its gravity flap opens with airflow and closes automatically when the fan stops. Compatible with standard 200mm round ducting, it’s ideal for high-capacity fans, cooker hoods, hydroponics, and utility room ventilation. Lightweight and easy to push-fit, it offers a simple, reliable non-return solution for better airflow control.