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History of the company from 1945 to date

75 year anniversary of 3S

The 3S group celebrates its 75th anniversary. How time flies! In 2020 the group consists of the sister companies Mariner 3S AG and 3S Systemtechnik AG and the subsidiaries Mariner 3S GmbH, Mariner 3S France Sarl, Mariner 3S España s.a.r.l. and Mariner 3S Italia GmbH.

Revision logo

The colors of the logo have been revised. The colors yellow and blue are new and have been used in the design of the cleaning robots for decades.

Subsidiary Company in Italy

During May 2017 the company Mariner 3S Italia Srl has been founded. This gives the possibility to provide a better service to the mariner 3S customers located in Italy.

Branch office in Poland

The Polish market is serviced by our own staff and managed through Mariner 3S GmbH in Gießen.

Generation Change

Beginning from January 1st the third generation of the Sommer family takes over the management.

Formation of Mariner 3S AG

After over 36 years of working together the owners decided to make a plan for succession, with the aim of keeping the company in the family. To help reach a sustainable and forward-looking solution, it was necessary to clarify and adapt some aspects of the organisation. The greatest change that this has brought about is the separation of the business areas of "Pumps" and "Swimming Pool Cleaning". The business area of "3S Pumps" will continue under the previous company. As a new company Mariner 3S AG was founded for the area of swimming pool cleaning. It will take over all domestic and international business activities in this field and the new company will include all subsidiaries.

Subsidiary Company in Spain

To boost the market position the subsidiary company mariner 3S España, s.l. was established in October in Rubí / Barcelona.

Subsidiary Company in FR & Branch Offices in AT & NL

In April mariner 3S France S.a.r.l. was established in Jouy aux Arches / Metz. For the customer support, additional branches were established in Paris, Bordeaux and Lyon within one year. Equally two new Branch Offices of 3S Systemtechnik GmbH Germany were established in A-3133 Traismauer (west of Vienna) Austria and in 1996 in the Netherlands.

Transfer of Company Headquarters to Remigen - New Corporate Name

At the end of the 1980s the owners decided to construct a new company building. The current building was getting too narrow and certain departments had to be placed in other locations. To renite all the departments into one building, the new company seat was built in Remigen (Switzerland) and finished 1991.

The former company name Sommer, Schenk AG to operate the business under the new registered name 3S Systemtechnik AG.

The trade mark mariner 3S is registered internationally.

Generation Change

Albert Sommer-Meier hands over the business to his four sons.

Subsidiary Company in Germany

To amplify the market position and ensure an efficient service organisation in Germany, 3S establishes in Giessen (Land of Hessen) its first subsidiary company.

Introduction of the product brand "3S"

Sommer Schenk Suisse introduces the product brand "3S".

Development and Production of "submatic"

In the recessionary years of 1975/76 3S’s own engineers succeeded in the diversification into Swimming Pool Cleaning. The revolutionary development of the submatic facilitates the remote cleaning of pool floors.

Expansion and name change

The company inaugurates its expansion and operated under a new name "Sommer Schenk AG".
Takeover of W. & R. Schenk & Co. AG, Worblaufen at the end of 1970 and integration of this company into the new corporation "Sommer, Schenk AG".

Establishment of the "Pumpenbau Sommer & Co"

The company "Pumpenbau Sommer & Co." is founded. Four sons of Albert Sommer-Meier take over the management.

The company specializes mainly in the production of centrifugal pumps for sewage and water supply systems, as well as general engineering.


Albert Sommer-Meier establishes a sole proprietorship in Schinznach-Dorf (AG). Purpose of the company is the development and manufacturing of centrifugal pumps. A versatile manufacturing program comes from humble beginnings.