How Do I Find Mains Water Leak?

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How Do I Find Mains Water Leak?

Water mains is responsible for supplying the water to your home, so when there is a leak in it, it can be problematic.
Leakage in water mains can cause a multitude of problems, rise in your utility bills, wastage of water in large amounts, drop in water pressure, not having enough water, structural water damage etc. And that’s not including the obvious repair and replacement costs and work for the water mains pipes. So it is of utmost importance that the leak is found as early as possible and patched up. But the question is, how can you find it?
For that, use our water main detection service the following tips to find the mains water leak in your home.

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Rule Out The Obvious:

It may sound funny, but that’s how you can eliminate all the other possible sources of the leak. So check the faucets, taps and visible pipes for any leakage. If the pipes are loose in the plumbing system, they could be the culprit, but if not, then move on to the boiler and water tanks. Check the valves. If everything else is in working order, then actively start looking for the water leak in the mains.

Check The Water Pressure:

Whenever you suspect any leak in your plumbing system, one of the first things that you can do is to check the water pressure. If your water bill is still same as before, or if it has started to increase over the past months and is not in line with other home’s bills in your area, then there is a leak in your home. Other than doing the above step, you should also check for the water pressure in all the areas of your home. Confirm if the pressure is same in all the places, i.e. bathroom, kitchen, shower, electrical appliances etc. are getting water at the same pressure or not.

Compare Water Bills And Your Water Usage:

This is actually quite easy. All you have to do is to keep track of all the water that you have used over a period of time, and then compare it with the water bill. If there is a leak in your system, and your water usage have remained almost same or decreased but the water bill is on the opposite spectrum, you can have your confirmation.

Keep An Eye Out For Damp Patches:

The water mains pipeline comes into your home through floors and walls, and is often located near the water boiler and furnace. So check for moisture or damp spots on the walls, floors and places near the water boiler.

Trace And Access:

This is actually the best method to find the mains water leak, but it can only be done by a professional company. The sensitive acoustic technology is placed on the ground to detect abnormal vibrations produced by the water leak, which is converted into sound. If found, then the leaking pipe can be exposed by digging a trench in that location. The biggest advantage of this method is that it is more accurate, exact and fast.

Why Choose 24/7 Drains?

At the end of the day, you can only perform the test that may hint towards the leak, but give no outright confirmation of it. So it’s better to hire a professional. So why not choose 24/7 Drains?

24/7 Drains employs the best qualified and experienced professional. Not only that, the technology and methodology used by the company is of higher quality, very accurate and precise. Finding the mains water leak will be very simple, all you have to do is to call them, and they will handle everything from there.


All of our plumbers are fully trained and hold relevant certifications including the UK government certification.

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Conduct A Test:

There is actually a very simple test that you can conduct on your own to find a mains water leak. First of all, turn off the stopcock, which will be located somewhere on your property. Confirm that it is turned off completely. For that, turn on a tap in your bathroom sink or kitchen, wherever you find it easier. After all the water is drained out of your home, the water will stop coming out from the tap, indicating that the stopcock is in fact, closed. Now, check your water meter, and snap a picture of the reading on your phone, or simply write it down. Water is no longer coming into your home, so the reading should remain constant, but if it’s increasing, then the obvious reason for that is the water is not passing your internal stopcock, but it is passing through the meter, which indicates the presence of leak. In any case, you have to be patient to catch the leak, especially if it’s a small one. So wait for two hours at least, and check the readings again.

But what if you don’t have a water meter in your home? Well, there is a solution for that too. To confirm the leak in the mains water pipeline, the pressure test is conducted between internal stopcock and external stop valve, because water is held or stays between them when both are turned off. However, for this test, calling a professional might be a better choice.

Water leak detection underground

Our fully trained engineers are DBS checked (formerly CRB). Each one of them and can save you from big problems like flooding and burst water mains to the smaller, but annoying and potentially damaging, problems of leaks. We can fix any water systems in your property or business and can be with you within the hour!

As soon as you spot a problem, don’t delay. Call 24/7 Drains immediately on 0121 530 2901. We provide services nationwide.