Changing rainfall patterns due to climate change are leading to increased frequency of intense rainfall with extreme weather events predicted to be become more common place.
The need to accommodate this in current building design can challenge traditional methods of roof drainage, with requirements to ensure efficient removal of rainwater from roof areas. Terrain HydroMax Siphonic Drainage is a complete and proven system, designed to rapidly remove high volumes of water, typically from large roof areas.
How it works
The Terrain HydroMax™ system 'sucks' water from the roof, using a powerful hydraulic force created by water accelerating down the full height of the building to deliver far greater capacity and flow rates than a gravity system.
In a gravity drainage system, pipework carries both air and water. The flow in gravity pipes is extremely inefficient because of the large core of air which enables the water to flow resulting in the need for larger pipes and more of them as well as extensive underground systems.
In the Terrain HydroMax™ system as rain falls, the roof drain prevents the ingress of air, rapidly purging it until the system is fully primed and running full bore. Water is transported in smaller diameter pipes to fewer, more convenient locations.
The system responds quickly to rainfall changes, is self-cleaning, drains rapidly when rainfall ceases, and is designed to prevent blockage by leaves, twigs and other debris.
See Siphonics in Action
- 10 times the flow capacity of conventional gravity system
- Faster water removal rates
- 20-45% cost savings over a conventional gravity system
- Reduces underground drainage
- Ideal for complex roof shapes
- Structural and space saving
- Accurate design software