Raw water and drinking water

Raw water and drinking water

The design, construction and maintenance of water networks is SADE’s historic business activity. From its very beginning, SADE has been providing assistance to local authorities in the field of drinking water conveyance and distribution networks, to satisfy ever-increasing consumption.

SADE has very quickly extended its services to industrial clients for the supply of raw water and drinking water to their production sites.

Water networks, the very essence of our business

Specialising particularly in the installation of large diameter pipes, SADE carries out the complete project, whether simple or complex, from water sampling in the natural environment to subscriber connections.

Its know-how encompasses boreholes and water catchment, pressurised networks, hydraulic works (storage tanks, reservoirs, and pumping stations), connections, leak repairs, water meter maintenance, indoor plumbing, bringing hydraulic installations into compliance with standards and regulations, warning stations, related facilities (extraction boreholes, inspection chambers).

Boreholes and water catchment

Supplying a water production plant from an underground source requires this water to be captured by creating and maintaining boreholes. For many years SADE has been expanding its activities in this field to install catchment systems in aquifers whereby the water can be brought to the surface.
Boreholes are complex installations to construct. In terms of both quality and environmental protection, know-how is just as important as the technical resources.
SADE employs the most modern methods, some of which are similar to those used in the oil industry. The drilled boreholes and wells are 5 to 800 metres deep and their diameters vary from 200mm to 3.5 metres according to the geological conditions.
SADE carries out this work for industrial clients, who benefit from a clean source of water for their production systems and site protection (fire fighting), and for local authorities, who then manage or sub-contract production themselves.

Whilst difficult to estimate, a borehole’s service life can be prolonged by regular maintenance. The precipitation of minerals contained in underground water or the development of bacterial colonies can result in reduced productivity and degradation of the pumped water or the aquifer itself. If regular monitoring and servicing is not carried out, the installation’s structure may have to be renewed and then rehabilitated.

SADE offers the following services:

  • For new works: feasibility studies, project financial viability evaluation, installation design, pumping tests, works implementation, maintenance, and monitoring;
  • For existing works: video inspection and diagnosis, defects analysis, designing solutions to restore hydraulic performance, drawing up specifications to optimise operations, etc.

At all stages of the project, SADE endeavours to protect the natural environment: resource evaluation (flow rate, chemical quality, piezometric level, etc.), analysis of the close and immediate environment (subsoil vulnerability, protection perimeters, etc.), implementing an ecological regeneration process (AIRSHOCK), etc.

SADE complies with the many regulations governing water boreholes: preparation of regulatory dossier, declaration to DRIRE (Regional Authority for Industry, Research and Environment), incidence study, human consumption declaration and sampling authorisation.

Pipes and connections

As Europe’s leading hydraulic contractor, since 1918 SADE has been meeting the needs of local authorities, private individuals and industrial businesses for water networks: drinking water, waste and rain water, fire fighting, industrial fluids. Whether installed underground, in tunnels or overhead, SADE combines all its areas of expertise for their design study, installation, maintenance, management, detection, diagnosis or rehabilitation.
Pipes and connections are the backbone of a network and its associated facilities.
Sade is able to lay pipes of 20 to 3,600mm diameter made of:

  • cast iron,
  • steel,
  • ceramic,
  • HDPE,
  • PVC,
  • composite materials (PRV etc.),
  • reinforced or non-reinforced concrete,
  • stainless.

In addition to normal environments, SADE also has the expertise, certifications and authorisations to operate in constrained environments: drinking water plants and reservoirs, regulated industrial complexes, sewage treatment plants, confined spaces, difficult-to-access areas (high overhead or underwater working) etc.
SADE’s teams are qualified to work on all types of connections:

  • locked or non-locked joints
  • welding on steel or stainless (TIG, rutile arc, cellulosic, etc.)
  • PE welding (electro-welding and mirror welding)
  • bonding
  • replacement of lead joints

SADE is equally specialised in working on networks in service, and fully controls disinfection and return to service procedures under time constraints.

For drinking water connections, SADE can:

  • connect new users, including while networks are in service,
  • modernise connections with lead removal.

Ecological connections, a SADE innovation, is a targeted response to these issues.

SADE has made the modernisation of lead connections one of its speciality sectors by developing the EXTRACTOR lead connection removal procedure which has enabled SADE to have already modernised 135,000 units throughout France since 1993. With this background, SADE is positioning itself as a complete service provider from contact with the subscriber to the technical operations.


Networks rehabilitation: tailor-made and cost-effective technical solutions...

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Related facilities

Civil engineering work, essential additional network installations...

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Water meters

Based in Ivry-sur-Seine, SADE’s Meters Division specialises in water metering and the associated radio technologies required to set up remote meter reading systems.

It is equipped with a DRIRE-approved calibration laboratory for regularly checking water meters and is accredited by COFRAC 17025 for liquid flow measuring as a guarantee of its neutrality, reliability and independence.

The calibration laboratory carries out measurements to define meter accuracy at a given flow rate. The businesses that operate drinking water networks can therefore benefit from a reliable calibration of their meters in compliance with the French regulations in force. The laboratory includes 13 DRIRE-approved test benches for calibrating meters from Ø 15mm to Ø 150mm.

Working for many years alongside Veolia Eau Banlieue de Paris and its Technical Department, the Meters Division has successfully implemented meter fleet management procedures which significantly improve their efficiency, as most typified by the Syndicat des Eaux d’Ile-de-France (SEDIF).

The qualifications and expertise of the department’s personnel and their rigorous and efficient methods enable SADE to devote its know-how to the service of its public, private and industrial clients for optimised water metering.

Backflow preventers

The sanitary quality of drinking water can be rapidly affected by pollutions due to backflows.

To avoid this malfunction, SADE installs backflow preventers at the domestic water arrival point, thus ensuring maximum protection against pollution hazards.

Checking that the filter works properly and that the backflow preventer’s various components (shut-off valves, flapgates and other valves) are watertight, and monitoring the differential pressure controlling the opening of the shut-off system, SADE carries out the design, installation, servicing and maintenance of this device, as required by the Ministry of Health.

Warning and monitoring stations

Warning and monitoring stations are positioned on rivers upstream from drinking water treatment plants for a permanent check on the quality of the resource. Using continuous physicochemical analyses, they detect pollution hazards in both raw and waste water.

SADE carries out the design, construction and maintenance of alarm and monitoring stations. Its service provision includes:

  • draft project,
  • installing the river intake point,
  • carrying out civil engineering and roads and utilities works,
  • all equipment (technical room, networks, analysers, automated systems and supervision systems),
  • station commissioning,
  • operator training,
  • installation monitoring.

By constructing Warning and monitoring stations, SADE continues to pursue its policy of sustainable development.

SADE - 23-25 av. du Docteur Lannelongue - CS 51450 - 75685 Paris Cedex 14