Water mains leak repair

Mains supply pipe leak detection

A leak in your water mains supply pipe can be difficult to diagnose and have expensive consequences for your water bill unless fixed quickly.

Water travels through these pipes at high pressure and can cause substantial damage when a hole is created by corrosion, the weather or simple old age.

Discover how to look for signs of a water mains leak below.

Your mains supply pipe is your responsibility

Many people believe that it is the job of their water company to fix a faulty mains pipe, but sadly this is unlikely to be the case for the majority of UK properties.

Your external stop valve controls the supply of water to your home from the street and is different to the internal stopcock usually found beneath your kitchen sink.

You are responsible for any leak or issue that occurs between the external valve and your property, whether beneath your garden or the building itself.

Water mains leak guide

  1. The signs of a mains water leak
  2. How we trace water leaks
  3. Why does my mains pipe leak?
  4. Water mains FAQ

The telltale signs of a mains water leak

Mains water leaks can be hard to notice due to the fact they are mostly located underground, however there are a number of above-ground clues that could signal a problem.

  • Is your water meter spinning when your stopcock is off? Your water meter will typically be installed on or near the external stop valve of your property. You can quickly determine if your water leak is between the external valve and your internal stopcock by turning off the stopcock and seeing if your meter continues to turn. We recommend leaving the stopcock off for at least an hour or two and monitoring any difference in the meter value.
  • Have you been surprised by usually high water bills? While it’s common for water usage to fluctuate throughout the year, if you’ve received a bill from your water company that doesn’t seem to reflect your actual usage, it may signal a hidden leak requiring immediate attention.
  • Are you experiencing low water pressure? A leak in your mains pipe can cause the pressure of the supply to your home to drop, resulting in slower running taps and showers. A noticeable change in water pressure with no wider issue reported by your supplier should be investigated. Water travels through mains supply pipes at high pressure and a leak can quickly release large volumes of water in a short period of time.
  • Have you noticed unusual levels of mould, condensation or smell of damp? The escape of water from your mains supply pipe running beneath your home can cause significant areas of damp or mould to develop in your home. We recommend that you urgently investigate the cause of dampness and condensation that you can’t otherwise account for.
  • Does your garden show signs of saturation or subsidence? If you live in a house, the journey from the external stop valve to your internal stopcock will likely travel beneath your front garden from the street. A leak in this area can often be spotted by an unusually wet patch of grass or evidence of subsidence in the ground.
Mains Water Leak

How we trace mains water leaks

We offer a fixed price trace and access service following the completion of a free visual inspection of your property. This visual inspection does not involve the use of any specialist detection equipment, but allows us to accurately gauge and price the work required.

Upon instruction to complete trace and access works, we will use one or a variety of the methods to locate your mains supply pipe before providing you with a further option for its repair.

These methods include the use of tracer gas, thermal imaging and endoscopic cameras.

1. Call 0800 037 7078

Our trace and access services are approved by all UK insurance companies. Call us for free today to discuss your situation and book in a free visual inspection by one of our expert technicians.

2. We’ll inspect your leak for free

Upon booking, we will carry out a free visual inspection of your reported water leak to provide you with a structured price for the trace, access and repair. The visual inspection will not find your leak by itself.

3. Get a fixed price to find your leak

We know how frustrating it can be when a price changes throughout a job. The price we quote you for the work will be the price you pay. Plus, we’ll provide you with a detailed report to submit to your insurance company.

Why does my water main pipe leak?

It’s natural to wonder why a pipe buried beneath your home may suddenly start to leak when it’s worked perfectly fine for many years.

Unfortunately, the breakdown of a pipe over time is mostly inevitable and unavoidable. The best thing to do when it happens is to act swiftly to arrange a repair and ensure that you have appropriate insurance in place to cover the costs.

Here’s three of the most common that reasons water main supply pipes fail:

Water Main Pipe Repair

The pipe is old and prone to corrosion

Many new-build properties in the UK benefit from modern pipework constructed from materials including ductile iron and PVC. Older pipes are a lot more susceptible to corrosion and a lot less resilient to changing temperatures, which can cause fractures and cracks over time.

High water pressure and ruptured the pipe

Regional water suppliers invest a lot of money in pressure management strategies to help maintain a consistent flow of water to your home. Changing water pressure through your mains pipe can lead to extreme surges causing the pipe to either leak or burst.

If you’re concerned about the water pressure supply to your home, we recommend contacting your water supply company directly before a problem has time to develop.

The pipe has been damaged by excavation work

Construction work at your property can lead to your mains supply pipe being damaged by machinery or equipment. The pipe usually runs around six feet below ground and hitting it can trigger a leak that may require repair or replacement completely.

Water mains leak FAQs

Dealing with insurance companies can be a frustrating experience, especially when you’re claiming for cover you’ve probably never needed before. We’ve included some of the most common questions regarding water mains leaks below.

Remember, if you still have a question, you can call us now on 0800 037 7078.

What should I do if I can’t find my external stop valve?

Locating your external stop valve is essential if you’re planning to self-diagnose the cause of your water leak. However, if you’re struggling to find it, your water supplier should be able to point you in the right direction. If you’re not sure who your supplier is, this handy tool from Water UK can help.

What if I live in a flat or a building containing multiple properties?

Blocks of flats or apartments may have either a single of multiple stop valves to control water supply to the building. Meters inside communal properties are specific to each home and you will only be charged for your own use, not that of your neighbours!

We work throughout the UK

Water leaks can happen at any time and can go unnoticed for weeks, months or even years. Miracle Leak Detection offers an unrivalled five-star trace and access service across the UK.

Visit the links below to explore our most visited counties. including Hertfordshire, Surrey and London.

Hertfordshire

Get your water leak found and fixed fast in all areas of Hertfordshire, from Bishops Stortford and St Albans, to Watford and Ware.

Hertfordshire Leak Detection

Surrey

We cover all areas in Surrey and south London, including Guildford, Epsom, Haslemere and more. View all of our Surrey locations below.

Surrey Leak Detection

London

Need us to find your leak in London? We work throughout greater London and the suburbs, as well as deep within the heart of the city itself.

London Leak Detection
Water Leak DetectionEpsom, Surrey

I cannot recommend Miracle Leak Detection highly enough. We've dealt with numerous tradespeople and this gentleman is an absolute star. He is a thoroughly professional guy, gave very good advice, was not pushy or over-bearing and is also a genuinely nice person. He knows his stuff and we would not go anywhere else. 10/10!

Trace & Access ClaimWeybridge, Surrey

Excellent timekeeping, explained regularly how he was getting on and gave a guarantee that he would find the water leak by that evening even though it took him a few hours! I would recommend him strongly to anyone who needs help especially at short notice!

Fixed faulty heating pipeGodalming, Surrey

Miracle Leak Detection saved me after our boiler lost pressure in the middle of a freezing cold night. An engineer arrived the next morning after I called to look for the source of the problem. He was very professional and promptly got my heating back without any hassle. I would happily recommend him to my family and friends.