Water Mains Leak Detection
Is your water bill unusually high? A hidden leak in your mains water system could be the cause. Our expert team specialises in locating and repairing leaks in water mains leak detection to help prevent costly damage. Get in touch with us today to find out how we can assist.
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Water Main Leak Detection Experts
Professional Mains Water Leak Detection Services
When your water bills suddenly spike or you notice unexplained wet patches in your garden, you could be dealing with a mains water leak. At Complete Leak Detection, our certified specialists use cutting-edge technology to locate and diagnose mains water leaks quickly and accurately, saving you from costly water waste and potential property damage.
Expert Insight
“As certified leak detection specialists with over 15 years of experience, we’ve seen how undetected mains water leaks can waste thousands of litres daily and cause significant structural damage. Early detection using professional equipment is always more cost-effective than reactive repairs.” – Complete Leak Detection Team

Understanding Mains Water Leaks
Your property’s mains water supply runs from the street connection to your internal plumbing system. Leaks can occur anywhere along this route, often hidden underground or within walls. Unlike internal plumbing leaks, mains water leaks frequently go unnoticed until significant damage has occurred or you receive an unexpected water bill.
Common causes include ground movement, pipe corrosion, poor installation, and extreme weather conditions. If you’ve received notification that Anglian Water said you have a leak or need help understanding your Thames Water leak notification, our specialists can provide immediate assistance.
Warning Signs of Mains Water Leaks
Unexplained Water Bills
Sudden increases in water usage without changes in household consumption patterns
Wet Patches in Garden
Persistently damp or soggy areas in your garden, driveway, or near the property foundation
Low Water Pressure
Reduced water flow throughout your property, particularly affecting multiple outlets
Water Meter Running
Your water meter continues to record usage even when all taps and appliances are turned off
Unusual Sounds
Hissing, gurgling, or running water sounds near the water meter or main supply pipe
Cracked Pavements
Damage to driveways, paths, or road surfaces caused by underground water erosion

Acoustic Leak Detection
Our acoustic listening leak detection equipment can detect the sound of water escaping from pressurised mains pipes, even through several metres of soil. This non-invasive method is highly effective for locating leaks in metal and plastic pipes.
Thermal Imaging Technology
Using professional thermal imaging leak detection cameras, we can identify temperature variations caused by water leaks. This technology is particularly effective for detecting leaks near the surface or under concrete.
Tracer Gas Detection
For the most challenging leaks, our tracer gas leak detection service introduces a safe, non-toxic gas into the water system. This gas escapes at the leak point and is detected using sensitive equipment, providing exact location data.
Our 4-Step Detection Process
Initial Assessment
Comprehensive site survey and water meter analysis to confirm leak presence
Technology Deployment
Using acoustic listening devices, thermal imaging, and tracer gas for precise detection
Exact Location
Pinpointing the leak’s exact position and depth without excavation
Detailed Reporting
Comprehensive report with repair recommendations and insurance documentation
Emergency Mains Water Leak?
Don’t let a mains water leak escalate into a costly disaster. Our specialists are available 24/7 for emergency detection and can often attend within 2 hours.
Call Now: 07897 020 680Why Choose Complete Leak Detection?
No-Dig Technology
Our advanced detection methods eliminate the need for exploratory excavation, saving your garden, driveway, and landscaping from unnecessary damage.
99% Success Rate
With over 15 years of experience and cutting-edge equipment, we successfully locate leaks in 99% of cases, backed by our no-find, no-fee guarantee.
Insurance Approved
We work directly with all major insurance companies and provide comprehensive documentation for claims, including detailed reports and photographic evidence.
Rapid Response
Emergency callouts available 24/7 with typical response times of 0-2 hours. Call outs within 24-48 hours. We understand that time is critical with mains water leaks.
Certified Specialists
Our technicians hold industry certifications and receive ongoing training in the latest leak detection technologies and safety protocols.
Complete Solutions
Beyond detection, we offer comprehensive trace and access services and can arrange qualified repairs through our trusted network.
Related Water Leak Issues
Mains water leaks often connect to other plumbing problems. If you’re experiencing related issues, our specialists also provide:
- 🔧 Underground leak detection for hidden pipe networks
- 🏠 Water leak detection specialist services for internal leaks
- 🌡️ Central heating leak detection for heating system issues
- 🚿 Bathroom leak detection for concealed shower and bath leaks
- 🏢 Commercial leak detection and repair for business properties
We also assist with pressure-related issues. If you’re wondering how to boost water pressure in your home or need help with boiler pressure that keeps dropping, mains water leaks could be the underlying cause.
Frequently Asked Questions
Preventing Future Mains Water Leaks
While some mains water leaks are unavoidable due to aging infrastructure or ground movement, regular monitoring can help identify issues early:
- Monitor your water meter regularly for unexplained usage
- Check for water inside your water meter housing
- Be aware of changes in water pressure throughout your property
- Watch for signs of ground subsidence or unusual vegetation growth
- Consider annual professional inspections for older properties
Understanding what to do if there is a water leak in your home can help you respond quickly and minimise damage. For comprehensive guidance, our pipe leak detection resource covers both internal and external leak scenarios.
Professional Recommendation
If you suspect a mains water leak, don’t delay in seeking professional detection. Early intervention can save thousands in water costs and prevent structural damage to your property. Our specialists are equipped to handle everything from minor seepage to major infrastructure failures.
Suspect a mains water leak affecting your property?
Contact our certified specialists for immediate assistance →
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Areas We Cover
Leak Detection Bedfordshire
Leak Detection Cambridgeshire
Leak Detection Essex
Leak Detection Hertfordshire
Leak Detection Norfolk
Leak Detection Suffolk
Leak Detection Peterborough
Leak Detection Greater London.
All Postcodes We Cover:
AL, CB, CM, CO, EN, HP, IG, IP, LE, LU, MK, NN, NR, PE, RM, SG, SS, WD