Reduction of spills : Exploiting the network's storage capacities



Limit discharges from the sewerage network to the receiving environment via storm overflows and optimise implementation costs for the project owner. 

The 3D EAU solution

Exploit the storage capacities of existing networks with the help of carefully positioned tilting valves developed and implemented by HYDRASS-3D WATER. 

Charte graphique 3D EAU.bmp

1 – Dry weather

2 – Storage

3 – Storage limit

4 – Spill

5 – Back to normal

Proposed general methodology

Phase 1 - Feasibility study

Taking into account the real environment of the work.


Characterisation of the hydraulic behaviour of the future valve to guarantee a good integration in the existing environment.

Phase 2 - Design and implementation

Design, manufacture and assembly in the workshop.


Testing on hydraulic test bench.

Phase 3 - Delivery

Delivery on site


Assistance with commissioning


Maintenance contract

3DEAU, autosurveillance, modélisation 3D
_vanne pivot  principe eaux


  • Less costly alternative to the creation of basins

  • Mechanical system that does not require a power supply

  • Can be integrated into a hydraulic network model

  • Instrumentable device for self-monitoring purposes

  • Anti-return function possible in case of downstream influence of the receiving medium

1. Installation in thunderstorm overflow - Deomatic valve

The Déomatic valve makes it possible to set the discharge height according to the capacity of the upstream network in order to store during current rains and to maintain the discharge capacity for heavy rains.


Dry weather 

Valve closed,
no impact on the network

Current rain

Valve closed,
network storage

Heavy rain

Valve open,
limited impact on the network

2. Networking - Stocko valve

The Stocko valve makes it possible, when there is no discharge point, to store in the upstream manifold for routine rainfall without limiting its discharge capacity for heavy rainfall.

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Dry weather 

Valve closed,no impact on the network

Current rain

Valve closed,network storage

Heavy rain

Valve open,limited impact on the network

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Reason managers are encouraged to test the impact of the Déomatic and StockO valves in their network models using the tool proposed by HYDRASS-3D EAU for this purpose.

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