Duct Non Return Valve 150mm / 6in Round Rigid Pipe Connector with Shutter Damper

Round male fittings - outer Ø 150mm / 6 in to fit inner Ø 150 mm / 6 in of ducting pipe. Equipped with a backdraft damper for backflow prevention. The connector fits into Ø 150 mm / 6 in round pipe ducting to connect two lengths in a straight line.