100mm Duct Non-Return Valve
 
The connector fits into Ø100mm  round pipe ducting to connect two lengths together in a straight line
For use with the Ø100mm Round Pipe Ducting systems
Connector type: Round male fittings - outer Ø100mm to fit inner Ø100mm of ducting pipe
Equipped with a backdraft damper for backflow prevention
Quick and easy fit
Lightweight
Material: PVC
Colour: White
Flame retardant