London & Surrey
Leak Detection
Professional water & gas leak detection across South London & Surrey. Fast, accurate, non-invasive diagnostics for homes and businesses.











South London & Surrey
Leak Detection
We provide specialist water and gas leak detection across South London & Surrey using advanced, industry-leading technology. Our expert team utilises professional equipment including thermal imaging, acoustic sensors, tracer gas systems, moisture analysis tools and inspection cameras to locate hidden leaks quickly and accurately. Whether the problem is behind walls, under floors, underground or within your heating or plumbing system, we identify the source without unnecessary damage, saving you time, money and disruption.

Water Leak
Detection
Water leaks are one of the most common hidden issues in homes and businesses. Left untreated, they can cause significant damage and increase costs. Our expert team uses cutting-edge technology—including thermal imaging, acoustic sensors, moisture meters, borescopes, and dye testing—to locate leaks quickly and accurately, often without any invasive work.
We detect leaks in:
- Pipes behind walls and under floors
- Bathrooms, kitchens, and utility rooms
- Roofs, gutters, and drainage systems
- Heating systems, boilers, and radiators
- Underground and external plumbing
By acting early, you protect your property, reduce bills, and prevent costly repairs.

Gas Leak
Detection
Gas leaks are less common but can be extremely dangerous. Our trained technicians provide fast, reliable detection for homes and businesses across South London & Surrey. Using advanced equipment—including tracer gas detection, acoustic sensors, and pressure testing—we can pinpoint leaks quickly and safely, even in concealed or hard-to-reach areas.
We detect leaks in:
- Gas pipework in kitchens
- Gas pipework in boilers
- Gas pipework in heating systems
- Central heating
Our safety-first approach ensures your property and occupants are protected, giving you peace of mind while preventing costly or hazardous incidents.

Our Leak Detection Methods
These are the professional water and gas leak detection methods that we use to ensure fast, precise, and reliable results:

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Thermal Imaging
Detect hidden leaks using heat and temperature patterns
A thermal imaging camera, also known as an infrared camera, detects the infrared radiation (heat) emitted by objects. All objects above absolute zero emit some infrared energy, which is invisible to the human eye but captured by the camera and displayed as a visible image with colours representing temperature differences.
- Identifies temperature variations caused by water leaks behind walls, floors, and ceilings.
- Escaping water is usually warmer or cooler than surrounding materials, making leaks visible.
- Non-invasive method that doesn’t require damaging surfaces.
Acoustic Detection
Identify leaks by listening for water or gas sounds
Acoustic leak detection works by picking up the distinct sounds and vibrations created when water escapes from pressurized pipes. Often, these sounds are inaudible to the human ear, especially if leaks are hidden behind walls or underground.
- Uses sensitive listening equipment to detect and analyse leak sounds.
- Effective for locating leaks in pressurized systems and concealed plumbing.
- Minimizes disruption to your property.


Tracer Gas
Pinpoint gas leaks safely with specialized trace gases
Tracer gas leak detection is a precise, non-invasive method for finding even the smallest leaks in plumbing, HVAC, or industrial systems.
- A safe, specialized gas is introduced into the suspected system.
- The gas escapes through tiny cracks or imperfections invisible to water or air.
- Highly sensitive detectors “sniff” the gas to locate the leak accurately.
Moisture Meter
Measure moisture levels to locate damp or hidden leaks
Moisture meters measure the percentage of water in a material by detecting changes in its electrical properties.
- Electrodes are inserted into materials like wood, drywall, or concrete.
- Electrical resistance decreases with higher moisture content, which the meter converts to a percentage reading.
- Helps identify damp areas caused by leaks and monitor the extent of water damage.


Borescope
Inspect pipes and cavities with a small camera tool
Borescopes use a small camera on a flexible or rigid probe to inspect concealed areas.
- Captures high-resolution video or images inside pipes and walls.
- Allows visual confirmation of leaks in hard-to-reach spaces without damaging property.
- Ideal for plumbing, wall cavities, or other inaccessible areas.
Dye Testing
Reveal hidden leaks using safe, colored liquid tracers
Dye testing introduces a brightly coloured, water-soluble, non-toxic dye into a suspected water system.
- The dye travels with water and appears at the leak point, making it easy to identify.
- Can use fluorescent dyes that glow under UV light for greater visibility.
- Effective for plumbing, drainage, septic systems, roofs, and swimming pools.


Pressure Testing
Check pipe integrity and find leaks under pressure
Pressure testing applies controlled pressure to a section of plumbing using water or air/gas.
- A drop in pressure indicates a leak.
- Highly effective for detecting hidden leaks in domestic or commercial systems.
- Helps locate leaks without invasive inspection.
Water Sampling
Analyse water to detect contamination or hidden leaks
Water sampling analyses the chemical or microbial composition of water entering or exiting a property.
- Compares the sample to known water sources to identify the origin of leaks.
- Useful for pinpointing hidden leaks and assessing contamination risks.
- Provides insight for remediation and prevention strategies.

Benefits of
Leak Detection
Why Professional Leak Detection Matters
Discover how professional leak detection can save you time, money, and stress. From protecting your property to improving safety and efficiency, our service helps you address problems before they become costly.

Prevent structural damage
Detecting hidden water or gas leaks early protects your walls, floors, and foundations from long-term damage.

Reduce water and energy waste
Identifying leaks promptly helps you avoid unnecessary water and energy loss, keeping your utility bills under control.

Early problem detection
Spotting issues at an early stage prevents minor leaks from turning into costly repairs.

Avoid mould
and damp
Quick leak detection reduces the risk of damp and mould, helping maintain a healthy indoor environment.

Safety
assurance
Detecting gas leaks early protects your home and family from serious safety hazards.

Non-invasive diagnostics
Our advanced equipment locates leaks accurately without causing disruption to your property.

Time and cost
savings
Pinpointing the exact source of a leak allows for faster repairs and lower overall costs.
What You Receive with Our Leak Detection Service
Full report with cause, damage, and repair
When we complete a water or gas leak detection service, you receive a comprehensive report detailing our findings and recommendations. This includes:
- Methods used – A full breakdown of every detection method applied, such as thermal imaging, acoustic sensors, tracer gas, moisture meters, borescopes, dye testing, or pressure testing.
- Findings from each method – Clear documentation of what each tool revealed, including the location, extent, and type of leak or blockage.
- Final summary – You’ll receive a complete report detailing the cause and location of the leak or blockage, any damage it has caused, and our recommended repairs or remedial actions tailored to your property.
This detailed report allows you to understand the problem fully, make informed decisions, and plan any necessary repairs with confidence.

Why choose an a.lings plumber?
Whether it’s emergency repairs, leak detection, a plumbing installation or general maintenance, we offer fast, reliable services throughout London & Surrey.
You can trust our qualified plumbers to deliver exceptional workmanship and ensure your home or business plumbing operates efficiently, all at a fair and transparent price.

EMERGENCY RESPONSE
Our plumbers are on hand for emergencies. If you are experiencing a burst pipe, leak or a potentially dangerous cylinder fault, give our office team a call and we will send someone out ASAP.

FULLY QUALIFIED & INSURED
To make sure our work always meets the highest standards, all of our plumbers hold the following qualifications and accreditations; NVQ, City & Guilds, G3 Unvented, WRAS, CHAS, Safe Contractor

FAST RESPONSE
TIMES
Our dedicated office team always make sure to respond quickly to any enquiries. If your issue is an emergency, we will make sure to prioritise the job to get you back up and running.

TRANSPARENT PRICING
We know it’s important to deliver quality work at a good value price. Our quotes are quick, straightforward, and transparent, ensuring there are no hidden fees. You can contact our team for any quote queries.

City & Guilds Qualified Plumbers
Guaranteed Workmanship
Choosing a City & Guilds certified plumber means selecting a professional with industry recognised qualifications and hands on expertise.
This certification ensures our plumbers are trained in the latest techniques, safety regulations, and best practices, giving you peace of mind that your plumbing system is in expert hands. A City & Guilds qualification signifies technical proficiency, reliability, and high quality workmanship.
emergency leak detection, london
At A.Lings Group, we’re dedicated to providing reliable and professional emergency leak detection services across London.
From the moment you reach out to us, our team ensures a seamless process. From dispatching a qualified plumber promptly to delivering expert diagnosis and repairs. With a commitment to safety, efficiency, and customer satisfaction, we strive to keep your home or business flowing and fuss free. Let us handle your plumbing needs with the expertise and care you can trust.
Step OneREQUEST OUR
ASSISTANCE
Contact our helpline to report your leak issue. Our friendly team is ready to assist you ASAP.
Step TwoPLUMBER
DISPATCHED
A qualified and experienced plumber will be dispatched to your location promptly, ensuring help arrives fast.
Step ThreeDIAGNOSIS &
REPAIR
Our expert will detect leaks, provide a detailed report of any issues, and carry out approved repairs.
Step FourLEAK FIXED, PROBLEM SOLVED!
Enjoy peace of mind knowing your leak issue has been resolved with safety and reliability in mind.
Leak Detection FAQs
London & South London | A Lings Group Limited
Leak detection is the process of locating hidden water or gas leaks in your property using specialized equipment, without causing unnecessary damage to walls, floors, or ceilings. It helps identify issues early, preventing costly repairs, reducing waste, and keeping your home or business safe and efficient.
Detecting leaks early can:
- Prevent structural damage to walls, floors, and foundations – Catching leaks before they worsen helps maintain the integrity of your property and avoids expensive structural repairs.
- Reduce water and energy waste – Early detection stops unnecessary loss of water and energy, lowering your utility bills and conserving resources.
- Avoid mould and damp issues – Identifying leaks quickly prevents damp conditions that can lead to mould growth, protecting both your property and your health.
- Protect your safety from potential gas hazards – Timely gas leak detection reduces the risk of fire, explosions, or health hazards for occupants.
- Save time and repair costs – Pinpointing the exact source of a leak allows for faster, more efficient repairs, reducing overall disruption and expense.
Gas leaks can be extremely dangerous, so it’s important to recognise the warning signs early. Common indicators of a gas leak include:
- A strong smell of rotten eggs or sulfur – Most gas suppliers add a distinctive odor to make leaks easier to detect.
- Hissing or whistling sounds near gas pipes – Unusual noises can indicate escaping gas in pipes or fittings.
- Dead or discoloured plants near buried pipes – Gas leaks underground can harm vegetation in the affected area.
- Feeling dizzy, nauseous, or lightheaded indoors – Exposure to gas in your home can cause health issues, including headaches, nausea, or breathing difficulties.
- Other subtle signs – Unexplained sounds from appliances, persistent corrosion on gas fittings, or unusual pressure changes in your system.
Water leaks can cause serious damage over time if left unnoticed. Be alert for these common signs:
- Unexplained spikes in your water bill – Even small leaks can significantly increase water usage and costs.
- Damp patches, mould, or musty smells – Moisture build-up often leads to mould, which can affect health and damage surfaces.
- Bubbling, peeling, or discoloured paint and wallpaper – Water infiltrating walls or ceilings often shows as surface damage or staining.
- Water pooling or dripping in areas without visible plumbing – Unexpected water accumulation is a clear sign of hidden leaks.
- Other indicators – Strange noises in pipes, unusually low water pressure, or persistent damp floors or ceilings can also signal a leak.
Most leaks can be located during a single inspection, often within a few hours, depending on the size and complexity of your property.
No — our methods are non-invasive, meaning we can locate leaks without drilling or breaking walls whenever possible.
Professional leak detection uses methods like thermal imaging, acoustic testing, borescopes, and tracer gas to find leaks without damaging your property. These techniques follow UK industry standards to ensure safety and accuracy. For more information on UK-approved leak detection practices, you can visit the Chartered Institute of Plumbing and Heating Engineering (CIPHE).
Yes — even minor leaks can:
- Increase water and energy bills
- Cause mould or damp issues
- Weaken structural elements over time
- Pose safety risks if it’s a gas leak
Where We Provide Expert Leak Detection Services
We proudly offer our leak detection services across a wide range of locations in and around London, including Banstead, Carshalton, Caterham, Croydon, South Croydon, Coulsdon, Kenley, Kingston Upon Thames, Mitcham, Morden, New Malden, Purley, Surbiton, Sutton, Thames Ditton, Thornton Heath, Wallington, Warlingham, Wimbledon, Whyteleafe, and Worcester Park. Our coverage extends across key postcode areas such as BN, BR, CR, GU, KT, RH, SE, SM, SW, and TW, ensuring reliable and accessible service for both residential and commercial clients throughout South West London and the surrounding counties.
