This connector will fit inside 4" / 100mm round pipes or 102mm flexible vent hoses and can be used to join multiple lengths of pipe together to extend ducting. Weighted off-centre hinge blocks external air - keeping connector in closed position.
Vent Duct Valve Connector 6" 150mm Cooker Hood Air Conditioning Non Return Flap
100mm/150mm Dia Hose with Check Valve for Extractor Fan Plus Cooker Hood Abs Plastic Square Flange Duct for Connector(150#)(150#(150(15(1((100#)
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2In Extractor Duct Strong wind speed Fan 12V Inline Exhaust 32Cfm 18W Ventilation Blower Air Vent Check Valve For Greenhouse Pet Bathroom Tent Room Basement (Color:Adjustable Speed
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White ABS Duct Flange Connector Compatible with 4 inch and 6 inch Vent Pipes
