Terrain Rainwater Outlets

Terrain Roof and Balcony Outlets for Commercial and Public Buildings

We've an extensive range of rainwater outlets for flat roof and balcony applications for commercial, industrial and public sector developments. Our comprehensive range covers outlets from 50mm-110mm.


If you're looking for outlets for a large roof area we'd recommend using the Terrain HydroMax™ siphonic system. You may also wish to consider the systems for greater flow rates, horizontal pipework and reduced pipe diameters too.


Contact us as early as possible in your project so that we can tailor the right system for your project needs. Click here or call us on 01622 795 200.

Features & Benefits


  • Can be installed easily on several different roof materials
  • Is compatible with Terrain Soil Systems
  • Can be used in conjunction with the Terrain Variable Flow Control Rainwater Outlet
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Terrain soil and waste technical manual

pdf (15.04 MB)

Terrain Drainage Price List

pdf (5.85 MB)