NEW UNITRACC Construction Site Documentation: "Rehabilitation of a DN 400 Concrete Gravity Sewer with a SAERTEX-LINER® MULTI over a Length of 69 m" (CIPP)

Nov 27, 2023

New construction site documentation in the renovation section of the e-learning platform: Rehabilitation of a DN 400 concrete gravity sewer with CIPP lining using SAERTEX-LINER® MULTI, type S+ Standard. The objective of this rehabilitation measure was to enhance the structural integrity and restore the impermeability of the old sewer. This digital learning unit was developed with contributions from the renowned manufacturer SAERTEX multiCom GmbH.


The renovation of our aging drainage systems, much like their initial construction, is a task that spans across generations. The methods and regulations for their rehabilitation undergo continuous development and improvement.

The construction site documentation Rehabilitation of a DN 400 Concrete Gravity Sewer with a SAERTEX-LINER® MULTI over a Length of 69 m is part of the digital distance learning and training platform's content. Besides construction sites and technical books, UNITRACC's corporate package includes CIPP modules about basics, processes, installation, and final work.

The material comprises 19 pages, featuring over 120 images and 15 videos.


Click here to access Rehabilitation of a DN 400 Concrete Gravity Sewer with a SAERTEX-LINER® MULTI over a Length of 69 m!


Time and Place
  • Distance / remote learning (online)
  • Flexible, extra-professional (part-time, full-time)

Target Group
  • Engineers
  • Technicians
  • Technical staff & executives (e.g., site / construction managers)
Recommended Qualification
B.Eng / B.Sc. or Bachelor Professional's degree with two years of working experience in civil / environmental engineering.


UNITRACC Knowledge Portal for Enterprises: 150 € p/m


Preview: Construction Site Documentation "Rehabilitation of a DN 400 Concrete Gravity Sewer with a SAERTEX-LINER® MULTI over a Length of 69 m" (CIPP) [Source: visaplan GmbH]


  • Description of the rehabilitation measure
  • Site preparation
  • Tools and aids
  • Vehicles and equipment
  • Materials
  • Occupational safety
  • Delivery of the lining tube
  • Installing the deflection pulleys and establishing the rope connection
  • Pulling in the gliding foil
  • Preparing the light source

  • Assembling the sling and the swivel
  • Pulling in the lining tube
  • Installation of the packers and safety caps
  • Insertion of the light source / light chain and curing
  • Removing the packers, cutting back the CIPP liner, and taking the material sample
  • Removing the temporary inner foil
  • Leak test according to EN 1610
  • Opening and reconnecting lateral connections
  • Dismantling the sewage bypass


UNITRACC Portal for Enterprises

UNITRACC is an e-learning, information, and working platform for underground construction. It has been providing online training courses to customers - who are mainly public agencies, engineering offices, higher education institutions, and skilled individuals - since 2003. The UNITRACC Knowledge Portal for Enterprises offers digital access to all courses, modules, construction site documentations, and technical books about the rehabilitation and maintenance of drains and sewers for a monthly fee of 150 €. Topics include water and wastewater pipeline construction, rehabilitation, management, and maintenance. They cover a huge variety of trenchless construction and rehabilitation technologies such as utility tunneling, microtunneling, pipe bursting, lining with close-fit pipes, lining with continuous pipes, lining with spirally-wound pipes, lining with cured in cured-in-place pipes (CIPP), injection and sealing processes as well as open cut method. Registration is free of charge. Click here to start the booking process.


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visaplan GmbH

Jasamin Teuchler

Content & E-Learning Manager

Konrad-Zuse Str. 6

44801 Bochum



+49 234 5167 215


+49 234 5167 109



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