Düker GmbH

SML pipe system (SMU pipes) by Düker

Düker SML Installation

Düker supplies a comprehensive range of no-hub SML pipes and fittings from DN 50 up to DN 300, in part up to DN 400. SML pipes are also called SMU pipes by some users. Apart from the simple fittings such as bends, branches and reductions, Düker also supplies special fittings for the connection of toilets and wash basins, siphons, inspection pipes, down pipe supports and connection pieces of other pipe materials, normally from stock.
SML (SMU) pipes are suitable for installation inside buildings. SML pipes and fittings can also be laid in concrete without problems, as the length expansion coefficient of cast iron and concrete are very similar, and as concrete protects cast iron from corrosion.
SML pipes can also be installed outside on a buildings (as a rain water down pipe) or for example in underground parkings. In case of such a visible installation with danger of corrosion, we recommend to apply an additional rust protection coating as known in the steel construction trade for optical reasons.


SML pipes and their coating

Outside, Düker SML pipes bear a reddish brown base coat in accordance with EN 877, which can be overpainted with customary coating systems.
Inside SML pipes have an ochre-coloured, fully cross-linked epoxy coating, which surpasses the requirements of EN 877 by far.
SML fittings bear an epoxy coating of the same quality inside and outside, which, however, is also reddish-brown to adapt them to the outside colour of the pipes.

Downloads regarding SML

- SML Specifier's Manual (pdf, 6,864 KB)
with all details regarding the range of products, installation and planning
including fire protection, noise protection, fittings etc.

- Datasheet (pdf, 191 KB)
on the new branch with short socket for floor level showers

- SML specifying texts
Word format (zip file, 114 KB)




Düker SML has proved itself in numerous and prestigious building projects in Germany and abroad. A small excerpt:
(click for enlarging)


Referenz Dresden

Kempinski Hotel, Dresden, Germany


MUSAC, Museum for modern art, León, Spain


Derby Hospital, Derby, United Kingdom


Taichung Tower, Taiwan

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