In-Building Rainwater & Rainwater Outlets

In-Building rainwater drainage and rainwater outlets for Commercial Building Services

Our in-building Terrain Rainwater Systems and Rainwater Outlets are used to drain flat roofs and balconies and convey water to underground drain or water re-use systems.


We would recommend using the Terrain Soil & Waste or Terrain FUZE drainage systems for this application, in conjunction with the Terrain Rainwater Outlets.

  • Siphonic Roof Drainage

    Our self-cleaning, high velocity Terrain Siphonic Drainage System provides an advanced roof drainage solution which can be used to drain large roof areas. Used on applications ranging from sta



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Terrain Above Ground (PVC-U above ground drainage systems) TAG5 Jan-19

pdf (16.76 MB)

Terrain Drainage Price List Feb 2019

pdf (5.85 MB)