Mains water leak detection is a job for specialist leak detection
experts.

There are symptoms of a Leak to look for and tests you can
carry out before you need our expert mains water leak
detection service.

Signs and symptoms to look for inside and outside your home
Simple DIY Leak Tests using your Stopcock and water main
Valve to confirm a leak exists on your property.
Our Techniques to locate leaks on water mains pipes.
Water Supply Mains Leak Repair Service

ADI Leak Detection have been detecting water mains leaks since
2011. Our nationwide network of plumbing engineers are some of
the most experienced and knowledgeable in the country.

CALL NOW ON 0800 731 3843

What are the signs of a leaking water main?

Signs of a mains water leak can be present outside, inside your property or not visible at all.
A mains leak will cause a spike in your water consumption which will lead to a high water bill. High water usage may lead to a section 75 notice from your mains water supplier.

There are many causes of water mains leaks, the responsibility for leaks varies.

INTERNAL

Low incoming water pressure with the stopcock or valve fully open.
Water meter constantly spinning when no water is being used in your property.
Increased levels of humidity, condensation or a damp smell in a room.
A sudden increase in water softener salt without higher water consumption.
Mould, Damp, Mildew or water damage to floors, and walls.

EXTERNAL

Hissing or gurgling sounds from the incoming water mains pipe.
Surface water puddles or flooding with no obvious reason.
Subsidence or boggy ground without an explanation.
An area of grass or garden growing faster than the rest of the lawn.

You can confirm you actually have a leak or leaks by carrying out some DIY leak tests.

DIY WATER MAINS
LEAK TESTS

DIY mains water leak tests will reveal if a water supply pipe is leaking.

WATER METER LEAK TEST

Method & Whats Required

Access to the Internal Stopcock, Mains Water Meter and stop valve.

Steps to take

Turn off the internal stopcock.
Locate the external stop valve near the water meter, typically under a labeled cover ("WATER", "W", or "WATER METER").
Open the cover and turn the tap/valve to the off position.
Record the water meter reading.
Wait 30 minutes.
Take a second water meter reading.

You have a water leak if the second reading from the water meter is higher than the first reading.

SYPHONIC CUP TEST

Method & Whats Required

Two people, a pint-sized glass, and a water shut-off key (i.e. a toby key).

Steps to take

One person fills a glass with cold water from the tap, keeping the tap submerged in the water.
The second person turns off the mains water supply at the external water meter/valve using a shut-off key.
Monitor the water level in the glass for 5 minutes.

You have a water leak if the water level inside the glass falls. A leaking in the water main will syphon the water from the glass back into the supply pipe.

HOW DOES ADI LEAK DETECTION FIND WATER SUPPLY LEAKS?

Expert technicians use non-destructive techniques to locate leaks. The depth of water mains pipes can affect the process.

Thermal imaging cameras are used to identify areas of damp flooring.
Acoustic ground microphones are used to listen for the sound of water escaping from pipes.
Hydrogen / Nitrogen Tracer Gases are used to in conjunction with a gas sensor and acoustic listening devices to confirm the location of the leak.
Ferret Leak Detectors and a Leak Correlation are available to aid the process of pinpointing a water supply pipe leak.

Our water mains engineers provide nationwide same day leak detection and repair service. We provide insurance-approved reports to assist with your insurance claim.

WE AIM TO FIND & REPAIR YOUR LEAK ON THE SAME DAY!

CAN YOU REPAIR
WATER MAINS LEAKS?

Water mains repairs can be carried out on the same day, if time allows.
Our fixed price leak detection service covers the cost of tracing the source of the leak.
A fixed price is given at the quotation stage for any repairs that can be carried out on the same day.
Leak repairs by our qualified and experienced plumbers are covered by our workmanship guarantee.

CALL NOW ON 0800 731 3843

MAINS WATER LEAK DETECTION FAQS

Got questions? We've got answers! If you don't find what you're looking for, feel free to reach out to us.

Does ADI provide a Nationwide Mains Water Leak Detection Service?

Yes. Our Mains Water Leak Detection Service is available throughout England, Scotland & Wales.

England

Bedfordshire
Berkshire
Bristol
Buckinghamshire
Cambridgeshire
Cheshire
Cornwall
Cumbria
Derbyshire
Devon
Dorset
County Durham
East Riding of Yorkshire
East Sussex
Essex
Gloucestershire
Greater London
Greater Manchester
Hampshire
Herefordshire
Hertfordshire
Isle of Wight
Kent
Lancashire
Leicestershire
Lincolnshire
Merseyside
Middlesex
Norfolk
North Yorkshire
Northamptonshire
Northumberland
Nottinghamshire
Oxfordshire
Rutland
Shropshire
Somerset
South Yorkshire
Staffordshire
Suffolk
Surrey
Tyne and Wear
Warwickshire
West Midlands
West Sussex
West Yorkshire
Wiltshire
Worcestershire
Yorkshire

Scotland

Aberdeenshire
Angus
Argyll and Bute
Ayrshire
Clackmannanshire
Dumfries and Galloway
Dundee
East Lothian
Edinburgh
Falkirk
Fife
Glasgow
Highland
Inverclyde
Lanarkshire
Midlothian
Moray
Perth and Kinross
Renfrewshire
Scottish Borders
Stirling
West Lothian

Wales

Blaenau Gwent
Bridgend
Caerphilly
Cardiff
Carmarthenshire
Ceredigion
Conwy
Denbighshire
Flintshire
Gwynedd
Isle of Anglesey
Merthyr Tydfil
Monmouthshire
Neath Port Talbot
Newport
Pembrokeshire
Powys
Rhondda Cynon Taf
Swansea
Torfaen
Vale of Glamorgan
Wrexham County Borough

Mains Water Leak
Detection