01DESKTOPS & ACCESSORIES
Silence the reverse flow
Tucked within the concealed runs of your bathroom or kitchen, this compact damper works quietly to maintain the intended direction of airflow. It is an invisible guardian against the chill that sometimes seeps back through idle extractor fans.
Designed for 4-inch ducting, it suits tumble dryers, cooker hoods and HVAC systems. The balanced flap ensures air moves out, while keeping cold drafts and outside smells at bay.
02MATERIALS
Durable black plastic housing
Crafted from robust black plastic, the unit resists the humidity common in laundry rooms and kitchens. Its matte finish blends discreetly into dark ductwork, ensuring the component remains visually unobtrusive even if exposed during maintenance or in utility spaces.
04INSTALLATION
Simple push-fit assembly
Arriving fully assembled, the damper installs by sliding it into the ventilation pipe until it seats firmly. For optimal performance, position the spring horizontally so the flap swings freely, whether the duct runs vertically or across the ceiling.
COMPATIBILITY
Versatile four-inch fit
Specifically sized for 4-inch diameter ducts, this blocker integrates seamlessly with extractor fans, hydroponic setups, and heat recovery systems. It serves as a practical addition to long duct runs, ensuring consistent airflow throughout complex ventilation networks.
AT A GLANCE
The key points
- Black plastic construction with a male spigot end
- Fits standard 4-inch diameter ducts and vents
- Balanced spring-loaded flap opens only with airflow
- Prevents draughts, wind and odours entering the pipe
- Slides directly into existing ventilation runs
About this product
Perfectly suited for ducting your Bathroom or Kitchen extractor fan, Hydroponics, In-Line Extract Fans, or Cooker Hood, Prevent cold air from entering your home through the dryer vent with our inline dryer vent draft blocker
Comes with balanced damper fully assembled, stops unpleasant odours, noises, or draughts flowing back through your duct
This backdraught shutter can be used as a part of a long duct run for a variety of purposes including whole house ventilation, passive stack vent, air conditioning, positive pressure, Tumble Dryer Venting, HVAC, and Heat Recovery Systems
White Plastic Extractor Fan Backdraught Shutter – Male Spigot
Duct draft stopper prevent cold air or wind from entering the ventilation pipe. In this case, the flap is installed in such a way that the flap leaves only open into the outgoing air direction. This means that no cold air / wind or smell can penetrate the ventilation pipe from the outside.
The backflow Preventer valve is installed by pushing it into the ventilation pipe as far as it will go. The position of the spring should be horizontal when the flap is installed horizontally so that it can be opened and closed optimally. This also applies to the vertical installation.
Compatible with 4″ Inch diameter ducts or vents. Easy to!
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