A reliable, easy‑fit solution for keeping your dryer, kitchen or bathroom vents free from back‑drafts and unwanted odors. The Universal 4 Way Dryer Vent Backflow Flap (100 mm Duct Connector) is a high‑impact plastic valve that snaps into any 4 in (100 mm) round duct or a 102 mm flexible vent hose.
How it works
– A weighted, off‑centre hinge holds the flap closed when there’s no airflow.
– When air moves through the duct, the internal pressure lifts the flap, allowing flow and then automatically sealing again once the fan stops.
Key benefits
– Stops smells and cold air from traveling back through your extractor fan or dryer vent.
– Extends ducting easily – simply join multiple sections to reach the desired length.
– Compatible with vented tumble dryers, air‑conditioners, kitchen hoods, bathroom fans, hydroponic systems and in‑line extract fans.
Specifications
– Diameter: 4 in / 100 mm (fits 102 mm hoses)
– Width: 58 mm
– Free flow area: 7,283 mm²
– Temperature range: –15 °C to 60 °C
– Colour: White
Designed for universal use across all major dryer brands and any appliance that uses a 4 in vent duct, this backflow flap offers a simple, durable way to improve ventilation performance while preventing unwanted drafts. Install it today for cleaner air and a more efficient home ventilation system.
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