Hydromax

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.

 

The Piping System
 
The collector pipe is normally installed horizontally without slope at high level and runs to a convenient point where it drops to ground level with a transition break connection into the below-ground gravity drainage system or manhole chamber.
 
Recommended Pipes
Terrain HDPE high density polyethylene pipes are manufactured in the UK to BS EN 1519-1:2000 and BBA certification. Fully welded to withstand high negative pressures, they offer excellent performance and durability with high weather and corrosion resistance. With a wide range of diameters and fittings for maximum design flexibility,they are lightweight with electro-weld joints for rapid and simple installation. In addition, stainless steel and cast iron pipes can be used for aesthetics or as dictated by the site.
 
Terrain HDPE
High density polyethylene pipes are manufactured in the UK to BS EN 1519-1:2000 
 
Features
 
 
 

 


 

See Siphonics in Action

 

WHY GO SIPHONIC?
  • 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

Correct Installation

Essential to the success and performance of a siphonic system, correct installation is ensured by the system design software and prefabrication of specified pipework.
 
In addition, installation is facilitated by the Terrain Rail System, which supports pipes, enabling them to be hung from roof voids, and restrains pipe expansion. All rails, fixings, connections and brackets are included for rapid and
speedy installation