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We have been specialising in manufacturing of and selling sewerage products made of the class EN GJL 150 and EN GJL grey cast iron. These days, grey cast iron with flake graphite regains favours as a constructional material – not out of lack of installation options or cheap casting technology, but due to its unique properties, such as: very good corrosion resistance, good thermal conduction, efficient vibration absorption and good machinability. 

These properties justify our choice of grey cast iron as a material for manufacturing sewerage products and guarantee its top quality.
Feel free to see our broad range of sewage manholes, street boxes as well as flared and non-flared cast iron pipe systems: http://kzo.pl/offer/