The simple locate: $200–$400
Short accessible runs: confirmed, pinpointed, marked without ceremony.
Precision Leak Location
Hidden Leak
Detection In
Killara
A leak you cannot see is still on the meter, still under the slab, still soaking the wall cavity. We find them with listening gear, thermal imaging and pressure testing, so the repair needs one small hole in the right place, not three big ones in guesses.
- Licence 368473C, fully insured
- Acoustic, thermal & pressure instruments
- One crew: finds it, then fixes it
How You Find A Leak Without Demolition In Killara
Every concealed leak makes three things: a sound, a temperature difference, and a pressure drop. The gear reads all three. Acoustic equipment listens for the specific frequency of water escaping under pressure and gets louder as we track along the line; thermal imaging paints the wet path through a wall or the warm plume of a leaking hot line under a slab; and isolating sections of pipework against a pressure gauge proves exactly which run is losing water and which is sound.
Cross-referenced, they put an X on the floor within centimetres. That precision is the entire point, the difference between lifting three tiles and re-tiling a bathroom. It matters double under Killara’s older homes, where pipes wander in ways no plan ever recorded, and the "obvious" place to dig is reliably wrong.
Sixty metres of pipe and no street to look from
Killara sits in leafy Ku-ring-gai on Sydney’s Upper North Shore (postcode 2071), a heritage suburb of grand Federation homes on large blocks between Lindfield and Gordon on the North Shore rail line. With mature trees lining nearly every street and older clay pipework beneath them, local drains see plenty, and we know the ground here well.
On a large block the service run from the meter to the house can be very long, all of it your responsibility, crossing ground that vehicles drive over and trees grow beside.
A leak anywhere along it is invisible from the house and expensive to find by digging. Correlation between two points on the run narrows it to a few metres, which is the entire difference between one excavation and a trench.
A century of pipework, and no plan of any of it
Many grand Federation homes still run original earthenware drains that crack and shift with age, letting roots and debris in.
Older homes are a record of everyone who has worked on them. Original runs, a post-war bathroom teed in somewhere unexpected, a laundry added in the sixties, and nothing documented.
That is why detection on a heritage-era property starts by establishing where the pipes actually go. Tracing the layout is half the job and it is the half that prevents opening the wrong wall.
Water surfaces downhill of where it escapes
Killara’s elevated, sloping garden blocks send heavy-rain runoff surging through stormwater pits that choke on leaf litter and back up.
On sloping ground, water leaving a pipe travels along whatever path is easiest until something stops it. By the time it appears it can be metres from the failure, several properties away, and always further down.
So the damp patch is a starting point, not a destination. We work uphill from it with correlation equipment rather than digging where the evidence happens to be visible.
Smell as evidence
A persistent sewer smell around a property with no obvious source is worth investigating properly. It usually means either a dry or failed trap, or a break in a line venting where it should not.
A smoke test finds both quickly, introduce smoke into the system and watch where it emerges. It is unglamorous, cheap, and conclusive in a way that sniffing around is not.
When the tank never quite fills
On a property running tank water, a supply leak shows up as consumption rather than as water, a tank dropping faster than the household explains, or a pump cycling when nothing is being used.
A pump that starts periodically with every tap closed is the clearest leak indicator there is on a rural property, and it is worth acting on immediately. It means the system is losing pressure somewhere continuously.
Damp that is not necessarily plumbing
Older houses have rising damp, failed flashings, blocked subfloor vents and perished mortar, all of which produce symptoms that look exactly like a leak.
Decades-old sewer runs beneath large heritage properties sag and collapse over time, needing a camera and the right fix to sort properly.
Establishing which one you have is worth doing before any pipe is repaired. A moisture profile that peaks at floor level and falls with height points at rising damp; one that peaks at a fixture or a pipe run points at plumbing.
What it costs in Killara
The standard job, $300–$500
First hour with the full kit, pressure isolation, thermal, acoustic, on a typical concealed leak.
The long trace, $100–$250/hr after
Extended runs, awkward access and multi-leak eliminations, beyond hour one.
The hard cases, up to ~$900
Deep slab lines and multi-storey tracing at the top of the Sydney range.
Then the fix, priced on proof
Quoted off exactly what detection found, repaired through the marked spot, same crew, same visit, one call-out.
Weigh it against the alternative: exploratory demolition starts at more than detection costs, and it starts in the wrong place. 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.
The Dial Moved, Didn’t It?
Then it is real, running, and billing you daily. Detection this week beats discovery through a ruined floor next month.
It is the most common way a concealed leak is found, usually after it has run a full quarter. Compare three bills rather than two: a single high quarter can be a garden or visitors, but a steady climb with no change in the household is a leak until something proves otherwise.
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.
It is elimination, not one instrument. Isolate sections and watch the meter to find which line is losing water, then listen along it with acoustic equipment for the sound escaping water makes. Where that is inconclusive, tracer gas is introduced into the isolated line and detected at the surface.
It makes digging a poor strategy. A leak anywhere along sixty metres of private line is invisible from the house and expensive to find by excavation. Correlation between two points narrows it to a few metres, which is the difference between one dig and a trench.
Worth settling before any pipe is repaired. Older houses have rising damp, failed flashings, blocked subfloor vents and perished mortar, all of which mimic a leak. A moisture profile that peaks at floor level and falls with height points at rising damp; one that peaks at a fixture or pipe run points at plumbing.
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.
It is the clearest leak indicator on a tank-supplied property: the system is losing pressure continuously somewhere. Worth acting on immediately, because on a long private run the water can be going into the ground entirely unseen.
Pinpoint The Leak This Week In Killara
Non-invasive detection, evidence before quotes, and one crew for the find and the fix.
