Basic detection, $200–$400
Straightforward jobs: a limited pipe run, good access, the leak confirmed and marked.
Non-Invasive Leak Detection
Find That Leak
Fast Across
Parramatta
The water bill knows something you don’t. Somewhere under a slab or behind a wall in Parramatta, a pipe is quietly feeding the ground, and finding it with instruments instead of a jackhammer is the difference between lifting three tiles and gutting a bathroom. We locate to centimetres, then repair through one deliberate hole.
- Licence 368473C, fully insured
- Acoustic, thermal & pressure instruments
- One crew: finds it, then fixes it
How A Hidden Leak Gives Itself Up In Parramatta
A hidden leak cannot help giving itself away three times over. Escaping water under pressure sings at frequencies acoustic gear can chase along a pipe run; it changes the temperature of whatever it soaks, which thermal imaging paints in false colour through wall sheeting and slab surfaces; and it bleeds pressure from whichever isolated section of pipework it lives on, which a gauge catches cold. One signal suggests; three signals triangulate.
That triangulation is what you are actually buying. Where the readings converge, we mark the floor, and in Parramatta’s renovated homes, where pipework wanders in ways no council plan ever recorded, that mark routinely sits metres from where anyone would have started digging on instinct. The difference between those two points is the difference between lifting three tiles and re-doing a bathroom.
High water table, and what it hides
Low ground near the Parramatta River drains slowly in heavy rain, overloading stormwater pits and backing water into yards and basements.
Close to the water the ground is frequently wet regardless of any plumbing fault, which removes the most obvious diagnostic anybody has. Damp subfloor, moisture in the slab edge and standing water in a trench prove nothing here.
So detection near the water leans on isolation and the meter rather than observation, and on tracer gas where a leak is genuinely hidden by ambient groundwater.
Working in a house that cannot simply be opened up
Parramatta’s Federation and Victorian homes still run original clay lines that crack and admit roots, a leading cause of slow drains in the older pockets.
Lath and plaster, pressed metal ceilings, original tiling and heritage listings all raise the cost of being wrong. In a period home the value of precise location is not the plumbing saved, it is the finishes not destroyed.
So we locate to the smallest area the equipment will support, and where a listing is in play we document what we propose to open before anything is touched.
Shower recesses: the most common leak in any block
Failed waterproofing in a shower is the single most frequent source of inter-lot water damage in strata, and it rarely presents as a leak at all, it presents as a damp patch on a neighbour's ceiling months after the membrane gave up.
The CBD’s dense apartment towers share drainage stacks where food waste, grease and wipes build up and back multiple units up at once.
It is worth ruling in or out early because it is a building repair rather than a plumbing one, and the process for approving and funding it is different. Flood testing the recess is inexpensive and definitive.
Retaining walls, terraces and the services behind them
Parramatta (postcode 2150) is Western Sydney’s second CBD, set on the Parramatta River and bordered by Harris Park, Westmead, Rosehill and North Parramatta. Its mix of apartment towers and Federation cottages gives its drains a real split personality, and we handle both.
Sloping blocks are full of retaining structures, and pipework often runs behind or beneath them because there was nowhere else to put it. A leak in that position saturates backfill, and saturated backfill is what makes retaining walls move.
Water showing at the base of a wall is worth treating as urgent even when the volume looks trivial. The plumbing repair is small compared with what the wall costs.
The leak that is a drain, not a water pipe
Not every escape of water is under pressure. A cracked drain leaks into the ground continuously without affecting the meter, without a pressure drop, and often without a single symptom inside the house.
The distinction decides the method. Pressure leaks are found with acoustics and the meter; drain faults are found with a camera and, where needed, a smoke or dye test.
Is it a leak, or is it the weather?
A recurring damp problem near the water often has nothing to do with plumbing. Wind-driven rain, a high tide against a low subfloor, and stormwater with nowhere to go all produce moisture that looks like a leak and is not.
The way to tell is timing. Damp that tracks the weather is not plumbing; damp that is constant regardless of conditions usually is. Keep a note of when it appears, it is genuinely useful evidence.
Water coming through the ceiling
The apartment showing the damage is almost never the apartment with the fault. Water tracks along the top of a slab, through penetrations and down whichever path is available, which can be several metres laterally before it enters your ceiling.
Thermal imaging and moisture mapping from below will usually establish the direction it is arriving from, which narrows the source before anyone needs access to a neighbour's bathroom.
What it costs in Parramatta
Typical first hour, $300–$500
The standard concealed-leak hunt with the full kit on site, acoustic, thermal, pressure testing.
Extended tracing, $100–$250/hr after
Long pipe runs, poor access or multiple leaks add gauge-and-listen time past the first hour.
Hard-to-access leaks, up to ~$900
Deep slab lines and complex multi-storey tracing sit at the top of the Sydney range.
The repair, priced on what we find
Detection tells you exactly what the repair involves, so the repair quote is built on evidence. One crew does both, no handover, no second call-out fee.
The comparison to hold onto: exploratory demolition costs more than detection before its first guess is even wrong. Figures here are indicative of the 2026 Sydney market rather than a quote from us, you get your own number as a fixed price before any work starts.
How The Hunt Runs
Step 01
Step 01
Confirm Before Chasing
The meter test done properly, plus your bills. If the evidence says there is no supply leak to find, you hear exactly that, free of a detection invoice.
Step 02
Corner It
Isolating pipework section by section against a pressure gauge, hot versus cold, line by line, convicts one run and acquits the rest.
Step 03
Mark The Spot
Acoustic tracking and thermal imaging walk the guilty run until the signals stack. The X on the floor is accurate to centimetres.
Step 04
One Hole, One Fix
Access opens exactly at the mark; the failed section is repaired and pressure-tested. If the run's condition argues for a reroute instead, both numbers land first.
Failed The Meter Test Just Now?
That is a leak, and it is not fixing itself. Book the detection before it surfaces through something expensive.
A standard detection visit generally runs $350-$650 depending on the size of the property and how much isolating is involved. Tracer gas or extensive thermal work sits above that. Market figures for 2026, not a quote, and if the meter test says there is no leak, you are told that rather than sold the rest of the process.
Because excavation is where the money goes, and water rarely surfaces where it escapes. The plumbing repair on a typical service leak is minor; getting to it is most of the cost, and getting to the wrong place is all of the cost with none of the benefit.
Damp or discoloured patches on walls, floors or ceilings; paint or plaster lifting at skirting level; a musty smell in one room; a patch of garden greener than the rest in dry weather; running water audible with everything off. And the one people dismiss, a warm patch on a floor, which is a hot water line under the slab.
Corrosion works faster in humid, salt-carrying air, and the small parts go first: tap bodies, external fittings, connections around a hot water unit. Many leaks we find on waterside properties are at a fitting quietly corroding in plain sight, and they are the cheapest to fix if caught before they let go.
Only as a last resort, and to the smallest area the equipment supports. In a period home the value of precise location is not the plumbing saved, it is the lath and plaster, pressed metal and original tiling that stays intact. Where a listing is involved we document what we propose to open first.
Pipework serving only your lot is yours; risers, mains and common-property lines belong to the owners corporation. A detection report naming the line, the lot and the direction of travel turns a dispute into a decision, a description of where the water appeared settles nothing.
Uphill of where you see it. On sloping ground water follows the easiest path underground until something stops it, so it can emerge metres away and always further down. We correlate uphill from the symptom rather than digging at the evidence.
Pinpoint The Leak This Week In Parramatta
Instruments, a mark on the floor, one hole, one fix: and the meter finally standing still.
