The vitrified clay pipes of yesterday have evolved. Today’s vitrified clay pipe still shares the same natural raw materials: clay, water and grog. But modern production has been refined into a high-quality, high-tech ceramic process which results in an extremely robust, durable and sustainable product.


Ceramic materials are highly valued in many sectors. The qualities of highly compacted, high-tech ceramics- the almost unlimited life-span and service life, the ability to withstand enormous temperature differences and high pressure- results in their use in fields as diverse as medicine, astronautics or the automobile industry. The high quality of ceramic materials is no-less suited to the sewage industry which requires the long-term transportation of effluent in an ecological and safe manner.



The material of today and tomorrow

The technical properties of ceramic products are today rightly valued in high-tech applications – heat shields in space flight, state-of-the-art brakes in sports cars to name just two. Pipes and fittings made of the silicate-ceramic material vitrified clay are equally worthy for use in sewer construction. The unique chemical and physical properties- particularly the hardness and strength- give these pipes and fittings tremendous resistance to wear and corrosion as well as an extremely long life-cycle far in excess of 100 years.

State-of-the-art pipes and fittings

Production technology for vitrified clay pipes and fittings is constantly developing. Result: better and better products. Improved techniques have allowed manufacturers to reduce drying times, increase pipe lengths and firing speeds and develop different firing methods to optimise circularity and increase straightness. These innovations have resulted from years of experience and know-how, resulting in continuous improvement of the vitrified clay pipe system.


A further advantage is the standardised product geometry of the vitrified clay pipe industry which has existed for over one hundred years; this increases accuracy and facilitates planning. The contrast with the rest of the market for sewage pipes is pronounced: diverse constructions, profiles, materials, strengths, ring stiffnesses and wall thicknesses cost time and money, impede project progress and may result in a project being tied to an individual system or manufacturer.

Vitrified clay pipes are replaceable

The compatibility and interchangeability of vitrified clay pipes, irrespective of manufacturer facilitates the maintenance and development of existing networks. According to the European Standard EN 295, all vitrified clay pipes with the same diameter and connecting system (C, F) as well as the same crushing strength are interchangeable: a unique feature in the market for sewage pipes.

Why standardisation is important

  • Enhanced user convenience: individual pipe elements can easily be added to existing sewer systems. The parts always match perfectly.
  • Greater planning certainty: standardisation and the long-standing experience of vitrified clay pipes permits more precise planning – both financially and in terms of time.
  • Quick assembly: all parts fit together quickly and easily; installation can proceed rapidly and budget savings can be realised.
  • Free movement of goods: all materials required to install pipes and fittings are specified in the European standard.
  • Quality benchmark: standards exist to make quality quantifiable; vitrified clay pipes are processed with great care and precision to ensure conformity with the Standard.  
  • Low stresses: vitrified clay pipes’ fitting accuracy minimises material stresses.