HOW DO THE RAIN HEADS WORK?
Dam Buster rain heads look like a normal rain head but instead of just being a metal box with a down pipe in the bottom, all models incorporate a unique internal weir, combined with a primary overflow chute downstream of the weir which is hidden behind the front facade. There is also a separate box gutter seal to prevent leaks at the back, plus two attachment lugs.
If the down pipe ever blocks or the volume of water discharging from the box gutter overwhelms the normal operation of the rain head, water simply discharges over the weir and is disposed of safely "to atmosphere" outside the building as required by Australian Standards.
This unique design allows the Dam Buster range to safely cope with enormous volumes of water during normal operation and without any risk of back flooding or over topping of the box gutter - both extremely common causes of catastrophic internal building flooding and insurance claims.
NB: All current Series 2 production models do not have the front secondary overflow (as shown); this leaves the face completely flat and without any secondary overflow hole on the front.
The whole Dam Buster range has been subjected to comprehensive and rigorous independent testing by the best Hydraulic Engineers in Australia. All models are certified to handle substantial flows during normal operation and also have enormous overflow provision, so they will keep efficiently working and doing their job protecting your investment when other rainheads and roof drainage products have given up and flooded the building.