Protection against sound

Whether stack or floor connection – the highly sound-insulating drainage system Geberit Silent-db20 is the ideal solution for projects with high sound insulation requirements:

  • Premium residential buildings

  • Hotels

  • Hospitals

  • Retirement and nursing homes

Geberit Silent-db20 applications

  • Building drainage

  • Conventional roof drainage system

Geberit Silent-db20 is suitable for embedding in concrete.

Many good reasons for Geberit Silent-db20


Plug connections for Geberit Silent-db20

Available for all pipe dimensions

With the expansion sockets with double flange and the double sleeve coupling, the thermally caused linear expansion of Geberit Silent-db20 pipes and fittings is balanced. This allows for large differences in the operating temperatures. The seals made of EPDM make a crucial contribution to the longevity of the drainage system.

Connections for all circumstances

Butt welding, electrofusion welding and clamping connection

Whether with fast electrofusion welding, a clamping connection or with butt welding – the Geberit Silent-db20 pipes and fittings can be securely connected in three different ways.

Time-saving installation

Prefabrication possible

The drainage system Geberit Silent-db20 enables efficient operating on the building site thanks to a wide assortment of fittings and tools which have undergone practical trials. Furthermore, the Geberit Silent-db20 is also suitable for prefabrication in the plumber's own workshop.

Shockproof and flexible

Intact pipelines even in cold conditions

High level of impact resistance even in cold temperatures as low as -40 °C: this robustness provides, most notably, a guarantee during the construction stage that the pipelines will remain intact despite possible mechanical influences.

Effective sound insulation

Sound reduction thanks to a high inherent weight

Increasing the inherent weight of the Geberit Silent-db20 pipes and fittings reduces their natural vibrations and sound is audibly insulated.


Outside storage possible

The polyethylene used by Geberit contains special additives which effectively protect against UV rays. The weatherproof Geberit Silent-db20 pipes can therefore be stored outdoors for months.

Sound insulation ribs

Built-in sound insulation

Special sound insulation ribs reduce noise development on the impact zones.

High discharge capacity

Hydraulically optimised for greater economic efficiency

The hydraulically optimised geometry of the Geberit Silent-db20 fittings ensures a high discharge capacity in the drainage system and allows both an economical dimensioning of the Geberit Silent-db20 pipes as well as a space-saving configuration of the pipe ducts.

Innovative fittings

Professional solutions for tricky requirements

Geberit continuously develops its piping systems. The floor height can therefore be reduced via the Geberit Silent-db20 combined branch fitting 88.5°, swept-entry for toilet and shower elements.

Outstanding fire protection

Certified fire protection solutions for various construction situations

The Geberit Silent-db20 drainage system comprises officially certified solutions for effective fire protection. Officially certified fire protection sleeves and floor sealing systems prevent fire and smoke from spreading to other storeys and rooms for 90 minutes.


Nominal width (DN)Dimension d x s (mm)

  • Vaste choix de raccords différents

  • Renforcement minéral dans les zones d'impact pour la réduction phonique

  • Divers raccords spéciaux


   Example Geberit Silent-db20 duct branch (swept entry) 88.5°/180° parallel

    Space-saving – if the stack is positioned between the toilet and the washbasin, Geberit Silent-db20 duct branch (swept entry) 88.5°/180° parallel allows for a very compact installation.


   Fire protection for Geberit Silent-db20 pipeline

  • The fire protection sleeves from Geberit can be used for a fire resistance class F 120

  • Fire tests carried out in accordance with EN 1366-3 for a multitude of different installation types

  • Approved for a fire resistance of 90 minutes (ETA/ETB) with the Geberit fire protection sleeve RS90 Plus EN


  Geberit air admittance valve GRB90 for Geberit Silent-db20

  • Alternative for installations which do not allow conventional ventilation due to space considerations.

  • Available for dimensions up to DN110


   Economical drainage of high-rise buildings

     Geberit HDPE Sovent fitting

 Geberit Silent-db20
Coefficient of linear expansion0.17 mm/(m K)
Absorption of linear expansionRequires expansion socket with double flange or double sleeve coupling
Permanent load application temperature-20 to 60 °C
Chemical resistance95 % of all standard alkalis, acids and chemicals

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