Tracer-Gas Leak Detection – Sub-Slab & Underground Leak Experts
Locate Underground Water Leaks with Precision Using Tracer-Gas Technology
Not all water leaks can be found with sound or heat. When traditional methods fall short, tracer-gas leak detection is the most advanced and reliable option — especially for slab leaks, underground services, or concealed pipework in walls and multi-storey buildings.
At Local Leak Detection Specialist, we use high-sensitivity hydrogen/nitrogen tracer gas systems to locate leaks with pinpoint accuracy, without needing to excavate large areas or cut into floors.
What Is Tracer-Gas Leak Detection?
Tracer gas testing involves:
- Isolating the water line
- Draining it completely
- Pressurising it with a safe tracer gas mix (usually hydrogen and nitrogen)
- Using sensitive detection probes to track exactly where the gas escapes
Because tracer gas is lighter than air, it rises directly through concrete slabs, tiles, soil, or walls, allowing us to pinpoint the leak with incredible accuracy — even when no water is visible.
When to Use Tracer-Gas Leak Detection
Tracer gas is ideal for:
- Slab leaks under bathrooms, laundries or living rooms
- Driveway or garden leaks where no acoustic signal can be heard
- Long pipe runs between meters and buildings
- Reticulation system leaks (irrigation, fire lines)
- Multi-storey leaks where water is travelling between levels
- Hard-to-hear copper or poly pipe leaks
- Low-flow leaks causing high water bills but minimal visible signs
Why Tracer Gas Is More Accurate Than Acoustic Alone
While acoustic listening is great for larger, louder leaks, it struggles with:
- Small pinhole leaks
- Buried or deep pipework
- Poly pipes
- Low-pressure systems
- Areas with ambient noise (roads, machinery)
Tracer gas detects leaks that are completely silent. That’s why it’s trusted by specialists like us when no other method can locate the issue.
Trusted Across All Property Types
We use tracer gas for leak detection in:
- Residential homes – under bathrooms, kitchens, garages, yards
- Strata & apartments – in shared walls or floors
- Commercial buildings – basements, loading zones, slab penetrations
- Industrial sites – warehouses, water mains, and pressure lines
- Government & infrastructure sites – schools, parks, aged care facilities
How Tracer Gas Protects Your Property
Because the process is:
- Non-invasive (no need to damage floors or walls to investigate)
- Safe for people, pets, and buildings
- Incredibly accurate
You save money by avoiding unnecessary repairs, exploratory digging, or incorrect assumptions.
Service Areas – Tracer Gas Leak Detection Across NSW
We offer tracer-gas services across:
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Sydney Metro (Parramatta, Inner West, CBD, North Shore, Hills)
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Wollongong & Illawarra (Thirroul to Shellharbour)
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Southern Highlands (Bowral, Mittagong, Berrima)
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Shoalhaven & Jervis Bay (Nowra, Vincentia, Huskisson)
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South Coast & Regional NSW (on request)
Need to Find a Leak That’s Been Missed?
If your plumber, builder, or previous leak detector couldn’t locate the issue, tracer gas might be the solution. We’re often called in as the last resort — and we get results.