Manthorpe G962 Black Remote Void Ventilator - Box of 10 Description The G962 Remote Void Ventilator is designed to connect the G930 Air Brick or G960 Underfloor Vent to a 4 Round Pipe or alternatively Manthorpes GRPA/1 Flexible Pipe. The adapter fits directly onto the bottom of the G960 Under floor Vent and can be easily cut down between the pre moulded cut lines to fit the G930 Airbrick. Features 8,800mm of airflow. Works with G930 and G960. Sleeves onto 4 round pipe or Manthorpes GRPA/1 flexipipe.