GSO EN 12056-3:2026
EN 12056-3:2000
Gulf Standard
Current Edition
·
Approved on
17 September 2026
Gravity drainage systems inside buildings - Part 3: Roof drainage, layout and calculation
GSO EN 12056-3:2026 Files
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GSO EN 12056-3:2026 Scope
This European Standard applies to wastewater drainage systems, which operate under gravity. It is applicable for drainage systems inside dwellings and commercial, institutional and industrial buildings. This third part of this European Standard describes a method of calculating the hydraulic adequacy of non-siphonic roof drainage systems and gives performance requirements for siphonic roof drainage systems. It also sets standards for the layout and installation of roof drainage insofar as they affect flow capacity.
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