Hidden leak? we find it without digging up your property
We use acoustic and thermal technology to locate leaks under slabs, in walls, and in underground pipes, accurately and with minimal disruption. Often we can find and fix in one visit.
Great Value Sydney Plumbing
Honest pricing and seasonal offers. Use the deals below when you book, terms apply as shown.
Book Online
and save$50Leaking Showers
from$89Seniors Discount
from10%Toilet Repairs
from$199Leak detection across Sydney
We find leaks other methods miss. Acoustic listening, thermal imaging, and pressure testing together mean we locate the leak wherever it is: under concrete, inside walls, or metres underground.
- Underground pipe leaks
- Slab leak find and fix
- Wall and ceiling leaks
- Pool leak detection
- Water main leaks
- Meter and line checks
- Thermal imaging
- Pressure testing and isolation
30 min
Typical arrival time
500+
Google reviews
15+
Years serving Sydney
10,000+
Customers served
A hidden water leak can cost you hundreds of dollars a year in wasted water before you even know it exists. Sydney Water charges approximately $2.35 per kilolitre. A leak losing just 1 litre per minute wastes over 525,000 litres per year, adding roughly $1,200 to your water bill. Beyond the bill, hidden leaks cause structural damage, mould growth, foundation movement, and electrical hazards. The longer a leak goes undetected, the more expensive the damage becomes.
Traditional leak detection often meant guesswork, trial and error, and digging exploratory trenches to find the source. Modern non-invasive technology has changed that entirely. We use three complementary methods: acoustic listening equipment that amplifies the sound of water escaping through pipe walls (even through concrete slabs and soil), thermal imaging cameras that detect temperature anomalies caused by water spreading through walls, floors, and ceilings, and pressure testing that isolates sections of pipe to pinpoint exactly which line is losing pressure.
Slab leaks (leaks in pipes running under or through concrete floor slabs) are particularly common in Sydney homes built before the 1990s, when copper pipes were standard under slabs. Over decades, copper reacts with the minerals in Sydney’s water and the chemicals in concrete, causing pinhole corrosion. The resulting leaks are invisible from above but can cause significant damage to the slab and subfloor. Our equipment can pinpoint a slab leak to within centimetres, allowing us to make one small access hole rather than cutting up the entire floor.
Pool leaks are another specialty. If your pool is losing water faster than normal evaporation (typically 3 to 5mm per day in summer), there may be a leak in the shell, pipework, or fittings. We use pressure testing on individual lines and acoustic equipment to locate shell leaks precisely, minimising the need for destructive investigation.
Once we’ve found the leak, we can usually repair it the same visit. For pipe leaks, we make one targeted access point, repair or replace the damaged section, test to confirm it’s holding, and restore the area. Every repair is backed by our lifetime workmanship guarantee.
Why book us to find your leak
Three ways to find it
Acoustic, thermal, and pressure testing together give pinpoint accuracy, even for leaks under concrete slabs or deep inside walls.
Minimal disruption
We locate first, then repair. Any cutting or digging is small and targeted, not trenches across the garden or slab.
Slab leaks are our thing
We find the exact spot through the concrete and make one small access point, not a trench across the floor.
Pool leaks too
Losing water from the pool? We use pressure testing and acoustic gear to find leaks in the shell, pipes, and fittings.
You see the evidence first
We show you the evidence before we recommend work (thermal images, pressure readings, acoustic data) explained in plain English.
Often fix the same visit
Once we’ve found the leak we can usually repair it that visit. One access point, minimal mess, lifetime guarantee on our work.
Need Us Now?
We’re on call 24/7 across Sydney. We aim for around 30 minutes. No call-out fee and we quote before we start.
Typical arrival: 30 minutes or less
How we find and fix the leak
Acoustic listening
We listen through pipes and surfaces for the sound of escaping water, even through concrete slabs and soil.
Thermal imaging
Thermal cameras detect temperature changes from water spreading behind walls, under floors, or through ceilings.
Pressure testing
We isolate sections of pipe and measure pressure drop to determine exactly which line is leaking and narrow the location.
Targeted repair
One precise access point. We fix the leak with minimal disruption, confirm it’s holding, and back it with our lifetime guarantee.
Over 15 years finding and fixing leaks
We find the source, not just the symptom
A drip you can’t find. A water bill that’s too high. A damp patch that keeps coming back. Those are signs of a hidden leak, and the longer it’s there, the worse it gets. We use several methods to find leaks other plumbers miss, without tearing your place apart.
Acoustic, thermal, and pressure testing together pinpoint leaks in walls, under slabs, and in underground pipes. Then we make one small access, fix it properly, and back it with our lifetime guarantee.
Call Us: (02) 9641 8100What Sydney Customers Say
Bankstown
Leak under the slab for weeks, bills going through the roof. They found it in under an hour with no digging. Fixed the same day. Brilliant.
4 days ago
Strathfield
Water bills spiked. They found a leaking pipe in the wall without opening the whole thing. Saved me from much bigger damage.
1 week ago
Cronulla
Efficient and accurate. The repair was exactly where they said. No guesswork, no wrecked garden. Highly recommend.
3 weeks ago
Bondi
Water leak on a Sunday night. Plumber at my door in 30 minutes. Found and fixed the leak, tested everything. Very professional.
1 month ago
Local Plumber When You Need One
Questions We Get Asked
- What are the signs of a hidden water leak?
- Common signs include unexplained high water bills, damp or soft patches on walls or floors, the sound of running water when all taps are off, mould or musty smells in unusual places, cracked or lifting tiles, warm spots on the floor (indicating a hot water pipe leak), and a water meter that keeps ticking when nothing is turned on. If you notice any of these, it’s worth investigating before the damage worsens.
- Will you have to dig up my garden or break tiles?
- Not necessarily. We locate the leak using non-invasive technology first: acoustic listening, thermal imaging, and pressure testing. Any access we need is small and targeted, not big trenches. For slab leaks, we typically make one small hole rather than cutting up the entire floor.
- Can you find pool leaks?
- Yes. We use pressure testing on individual pool lines and acoustic equipment to locate shell leaks precisely. Normal evaporation in Sydney is roughly 3 to 5mm per day in summer. If you’re losing water faster than that, there’s likely a leak in the shell, pipework, or fittings.
- What if the leak is under a concrete slab?
- Slab leaks are a specialty of ours. We use acoustic equipment to pinpoint the exact location through the concrete, then make one small access hole. This is far less disruptive and expensive than exploratory trenching across the slab.
- How much does leak detection cost in Sydney?
- We give a clear fixed price before we start. Cost depends on the complexity: a straightforward wall or ceiling leak costs less than a slab leak or underground pipe leak. There’s no call-out fee and no hidden charges.
- Can you fix the leak the same day?
- Often, yes. Once we’ve located the leak, we usually have the equipment and parts to repair it on the same visit. One access point, proper repair, pressure tested, and backed by our lifetime guarantee.
- How do I check if I have a leak using the water meter?
- Turn off all taps, appliances, and irrigation in your home. Note the reading on your water meter. Wait 2 hours without using any water, then check the meter again. If the numbers have changed, you likely have a leak somewhere in your plumbing system. Call us for a professional leak detection to find exactly where it is.
- Can a hidden leak affect my home insurance?
- Many home insurance policies cover sudden and accidental water damage, but gradual leaks that were left unattended may not be covered. Finding and fixing leaks early protects both your property and your insurance position. We provide detailed documentation that can support insurance claims.
- What causes pipes to leak under slabs in Sydney?
- The most common cause is pinhole corrosion in copper pipes, which occurs over decades as copper reacts with minerals in Sydney’s water supply and the alkalinity of concrete. Ground movement, tree root pressure, and poor original installation can also cause leaks. Homes built before the 1990s with copper under-slab pipes are most at risk.
- Is a small leak really that urgent?
- Yes. Even a slow leak wastes enormous amounts of water: 1 litre per minute adds up to over 525,000 litres per year (roughly $1,200 in water charges). Beyond the cost, ongoing moisture causes mould growth (a health hazard), timber rot, concrete degradation, and can compromise your home’s structural integrity. Early detection saves money and prevents serious damage.