- The inspection of the 7.9 km pipeline with Aganova’s Nautilus® technology located four hidden leaks and one anomaly that had prevented the infrastructure from meeting commissioning requirements.
Langford, United Kingdom – July 21, 2026. Aganova and SUEZ have supported Essex & Suffolk Water in successfully commissioning a new DN800 raw water transmission main serving Langford Water Treatment Works in Essex, United Kingdom.
The 7.9 km pipeline was constructed to increase supply capacity and reinforce the resilience of the water network. However, repeated pre-commissioning pressure tests revealed the possible presence of defects that conventional leak detection methods had been unable to locate.
To address the issue, SUEZ’s Leakage and Condition Assessment Team worked with Aganova to inspect the pipeline using Nautilus®, Aganova’s free-swimming in-line inspection technology.
The inspection precisely located four leaks and one additional anomaly, providing Essex & Suffolk Water with the information required to undertake targeted repairs. Following the completion of the remediation work, the pipeline successfully met its commissioning requirements.
Advanced inspection technology unlocks pipeline commissioning
The pipeline’s rural location and the absence of visible signs of leakage made it particularly difficult to determine the source of the pressure losses. Nautilus® travelled inside the pipeline with the water flow, recording acoustic data to identify leaks and other anomalies that could not be detected from the surface.
The inspection, carried out last summer, identified two high-severity leaks, one medium-severity leak, one low-severity leak and one anomaly consistent with an incipient leak. The two most significant leaks alone were estimated to be responsible for approximately one megalitre of water loss per day, explaining the repeated failure of the pressure tests.
Aganova and SUEZ specialists analysed the inspection data and delivered a detailed report to Essex & Suffolk Water within one week. The precise location of the incidents allowed repairs to be focused on the affected areas, avoiding further investigations and unnecessary excavation along the nearly eight-kilometre pipeline.
Collaboration to strengthen water network resilience
The successful commissioning of the Langford raw water main represents an important milestone for infrastructure designed to enhance supply capacity and network resilience.
The project brought together Aganova’s advanced in-line inspection technology and SUEZ’s expertise in leakage detection and pipeline condition assessment to resolve a complex issue that had delayed commissioning.
The results also highlight the role of advanced inspection technologies in supporting the delivery of critical water infrastructure by reducing uncertainty, enabling targeted interventions and accelerating decision-making.
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About Aganova
Aganova is a pioneering technology company specializing in the condition assessment of large-diameter pressurized pipelines through advanced leak detection technology. Its intelligent inspection devices, combined with proprietary artificial intelligence analytics, accurately identify leaks and pipeline anomalies, delivering actionable data that helps prevent water losses. Aganova empowers water utilities and NRW managers with precise asset intelligence, enabling cost-effective, low-impact maintenance strategies. Since 2016, its technology has helped save millions of cubic meters of water worldwide. To learn more, please visit aganova.com.
About SUEZ
Faced with growing environmental challenges, SUEZ has been delivering essential services that protect and improve our quality of life for more than 160 years. SUEZ provides its customers with innovative and resilient solutions for water and waste services.
With 40,000 employees across 40 countries, the Group works with customers to create value over the full lifecycle of their assets and services, and to drive their low carbon transition. In 2025, SUEZ provided drinking water for 67 million people worldwide and sanitation services for 36 million people. The Group generated 8.7 TWh of energy from waste and wastewater. In 2025, SUEZ generated revenues of 9.5 billion euros.
For more information: suez.com/en
About Essex & Suffolk Water
Essex & Suffolk Water is part of Northumbrian Water Group (NWG).
NWG contains Northumbrian Water, which serves 2.7 million people in the north with water and sewerage services, and Essex & Suffolk Water, which provides 1.8 million people in the south with water services.
Essex & Suffolk Water provides water services to two separate supply areas. Our Essex area, which has a population of 1.5 million, is part rural and part urban with the main areas of population being in Chelmsford, Southend and the London Boroughs of Barking and Dagenham, Havering and Redbridge.
We serve a population of 0.3 million in our Suffolk area, which is mainly rural with the biggest towns being Great Yarmouth and Lowestoft.
For more information, please visit eswater.co.uk.
Media Contact:
Aganova
Cristina Mauleón
Marketing and Communications
T. +34 951 014 672
