is a surface water drainage system which utilises the principle
of full-bore flow. The UV-System is most frequently used for the
drainage of rainwater from roofs. The title "UV" is
an acronym for the Finnish word "umpivirtaus" used by
its inventor, Mr Olavi Ebeling, to describe full-bore flow.
invention in 1968 more than 60 million square metres of roof have
been drained of precipitated rainwater by the UV-System. The first
UV-System outlet (patented in 1968) provided a breakthrough in
piped drainage by eliminating air-entrainment via the outlet into
the connected pipework at acceptable water depths around the outlet
on the roof.
the hydraulic principles established by eminent scientists and engineers
- Bernouilli, Prandtl, Darcy, Nikuradse, Weisbach, Colebrooke et
al - could be brought together to facilitate the accurate design
of fully water-filled pipe systems.
The benefits to
the construction industry were immediately seen.
The UV-System rapidly
established itself throughout Scandinavia during the early 1970s
and companies such as ABB, IBM, Astra, Ericson, Pilkington, Electrolux,
IKEA, Pharmacia & Upjohn, SAAB, Avesta, Volvo etc made good use
of the advantages of the new technology.
gradually spread to Europe and the rest of the developed world
(with the notable exception of the USA) in part due to the above
companies relocating outside Scandinavia.
concept for this technique has been continuously developed by
its inventor, Mr Olavi Ebeling, since inception and in collaboration
with Mr Per Sommerhein of Stockholm post 1972. Current UV-System
outlets and applied UV-System dimensioning technology are the
result of almost 30 years of development, study and experiment.
UV-System thus represents best practice for any project, anywhere.
also supply the range of Eurotube & Eurofusion®
Pipe and Fittings, and Thermoplastic Fabrications. Please contact
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