A flap valve for both the 4″ and 5″ conservation vent grilles or to install in round ducting.
The flap can be duct taped directly onto the back of the conservation vent to keep out any insects and prevent any backdraught.
The Cast Iron Air Brick Company supply cast air bricks and a huge range of ventilation grilles and gratings to individuals and the trade. Our items are used to replace existing defective cast iron ware and are more commonly used in new builds.
Former customers properties including Queens residence at Buckingham Palace, prime ministers home at Chequers, Oxford and Cambridge universities and new builds including London 2012 Olympics.
We are able to supply just one air brick and can also supply architects and developers with large quantities.