Underground Water Leak Detection Services in London

Water leaks can be a serious issue for homes and commercial properties alike. If left unresolved, even a small underground leak can lead to inflated water bills, reduced pressure, structural damage, and in commercial environments — disruption to business operations. A modest water main leak of just 1 litre per second could add approximately £60,000 per year to a commercial water bill.

 

At Greater London Water, we understand that visible surface water doesn’t always indicate the origin of the leak. Our trained engineers use industry-leading underground water leak detection equipment to accurately locate the source before any excavation or replacement begins.


What’s Included in Our Water Leak Detection Site Survey
 

Our underground water leak detection surveys are comprehensive and non-invasive. They include:

Mapping All Water Mains

We locate and mark every water supply line on the property, dividing the site into distinct detection zones.

 

Monitoring Usage

By recording flow rates and analysing daily water usage, we identify anomalies that may signal a water main leak.

 

Flow and Pressure Testing

This helps us assess system performance and isolate any inconsistencies that could point to a leak.

 

Acoustic Correlation and Ground Microphones

Advanced listening technology allows us to detect sound vibrations from leaks and narrow down the exact location.

These techniques are non-disruptive, and we plan all work to minimise any impact on your operations. For commercial clients, we offer flexible scheduling, including evening and weekend service if required.


Techniques We Use to Detect Underground Water Leaks
 

Once the survey zones have been established, we use advanced detection methods to narrow down the leak to within half a metre. Our techniques include:
 

Leakage Detection

This includes acoustic sounding, correlation, pipe tracing, and the use of ground microphones to locate leaks accurately underground.

 

Flow and Pressure Logging

Data loggers are installed temporarily to capture real-time flow and pressure data, which is then analysed for irregularities.

 

Step Testing and Zero Pressure Testing

These methods help isolate sections of the network, confirming the presence and impact of leaks.

 

Leakage-Controlled Zones

We can design and set up zones that allow for the isolation and continuous monitoring of specific areas of the water supply pipe.

 

Crisis Monitoring and Prevention

Ongoing monitoring, pressure logging, and water balance assessments help detect problems before they escalate.

 

Pressure Management Solutions

We assess whether your system pressure is contributing to the problem and recommend adjustments to prevent future leaks.
 

Why Choose Greater London Water for Water Leak Detection in London?
 

Minimal Disruption

All our surveys and testing methods are designed to be as non-invasive as possible, with no interruption to your water supply during detection.

 

Advanced Technology

Our water leak detection specialists are equipped with modern equipment and proven techniques to find leaks quickly and efficiently.

 

Cost Control

Early detection helps prevent rising utility costs and property damage, keeping your water system efficient and your bills under control.

 

London-Focused Expertise

We understand the challenges of London’s ageing infrastructure, mixed building stock, and complex underground utility networks.​
​
 

Contact Greater London Water for Underground Leak Detection in London

If you suspect an underground water leak — due to rising bills, damp areas, or reduced pressure — contact Greater London Water for a professional leak detection survey. Our experts will identify the problem and provide clear recommendations for addressing it efficiently either by carrying out a water supply pipe repair or replacement.

To arrange a consultation and receive a quotation for our water leak detection services, get in touch with the team at Greater London Water today. Call us on 0207 1234 996 or email hello@greaterlondonwater.co.uk to schedule a free consultation and learn how we can help with your water leak detection needs.

​

​