Simple locates, $200–$400
Short runs, decent access, leak confirmed and marked without drama.
Leaks Found, Not Guessed
Find That Leak
Fast Across
Cherrybrook
Somewhere between the meter and your taps, water is escaping, you can see it on the bill even when you cannot see it anywhere else. We pinpoint concealed leaks across Cherrybrook with instruments instead of crowbars, so the repair opens one small hole in exactly the right place.
- Licence 368473C, fully insured
- Acoustic, thermal & pressure instruments
- One crew: finds it, then fixes it
Three Instruments, One Answer, In Cherrybrook
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 Cherrybrook’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.
Ground that moves, and the leaks it starts
Many Cherrybrook homes still run the original pipes laid when the suburb was built, and decades of ground movement leave them cracked, sagging or blocked.
Reactive ground swells and shrinks with moisture, and it does not do it evenly across a property. Anything rigid crossing that ground is worked at its weakest point until something opens, usually a joint, usually slowly.
It is why leaks in this kind of country tend to appear after the seasons turn rather than during a single event, and why the same property can produce a second one years later a few metres from the first.
Retaining walls, terraces and the services behind them
Cherrybrook is one of the greenest suburbs in the Hills, and all those mature trees push roots straight into ageing pipe joints, the number-one cause of recurring blockages here.
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.
Under the slab: finding it without opening the floor
A leak beneath a concrete slab is the one everybody dreads, and the dread is mostly about the excavation rather than the plumbing.
Which is exactly why locating it precisely is worth paying for. Acoustic listening, thermal imaging and tracer gas will normally place a slab leak inside a small area, the difference between cutting one section of floor and exploring several.
Water surfaces downhill of where it escapes
Cherrybrook’s sloping, bushland-fringed streets send heavy-rain runoff surging through stormwater pits and lines that silt up 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.
The clues that show up in the building first
Long-running leaks in reactive soil often announce themselves through the structure rather than the plumbing: a door that has started binding, a hairline crack above a window, floor tiles lifting in one corner.
Those are worth mentioning when you call. A pattern of movement in one part of the house tells us where to look before a single instrument comes out of the van.
Pressure at the bottom of the hill
Mains pressure rises as elevation falls, and properties low on a slope routinely sit at the top of the acceptable range. Sustained high pressure is a genuine cause of leaks rather than merely a contributor.
Cherrybrook sits in Sydney’s leafy Hills District (postcode 2126), a green, established family suburb bordering West Pennant Hills, Castle Hill, Thornleigh and Dural. With larger tree-lined blocks, mature gardens and homes mostly built through the 1980s and 90s, plus the newer builds around Cherrybrook Metro and the Village shops, its drains cop plenty, and we know the local ground well.
If your property is low-lying relative to the surrounding streets and you have had more than one fitting fail, a pressure test costs very little and a limiting valve costs little more. It is the cheapest leak prevention available.
What it costs in Cherrybrook
The standard hunt, $300–$500
First hour with the full instrument kit, acoustic, thermal, pressure, on a typical concealed leak.
Long or awkward traces, $100–$250/hr
Beyond the first hour: extended runs, tight access, multiple suspects to eliminate.
The genuinely hard ones, up to ~$900
Deep slab lines and multi-storey mysteries at the top of Sydney's range.
The repair itself, quoted on evidence
Priced off exactly what the detection proved, fixed before it starts, same crew, same visit, no second 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.
The Hunt, In Four Moves
Step 01
Step 01
Prove There Is A Leak
The meter test, done properly, plus your bills and history. If the evidence says no supply leak, you hear that, not a bill for finding nothing.
Step 02
Isolate The Section
Pressure-testing the pipework in sections, hot against cold, line by line, corners the leak into one run before any listening starts.
Step 03
Pinpoint It
Acoustic gear and thermal imaging along the guilty run until the readings converge. The mark on the floor is where the repair happens, centimetres, not metres.
Step 04
Repair Through One Hole
Access exactly at the mark, the failed section repaired, pressure-tested, closed up. If the line's condition says reroute instead of repair, you get both numbers first.
Failed The Meter Test Just Now?
Then it is real, running, and billing you daily. Detection this week beats discovery through a ruined floor next month.
The meter test, and it is free. Turn off every tap and appliance that uses water, read the meter including the smallest dial, then check again an hour later without using anything. If the reading has moved, water is leaving the property. If it has not, you do not have a pressurised leak, which rules out a lot before you spend anything.
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 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.
Acoustic listening, thermal imaging and tracer gas, which together normally place it inside a small area. That precision is exactly what you are paying for, it is the difference between cutting one section of floor and exploring several.
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 can be. Long-running leaks in reactive ground often show up through the structure first: a door binding, a hairline crack above a window, tiles lifting in one corner. Mention it when you call, a pattern of movement in one part of the house tells us where to look.
If you are low on a slope, quite likely. Mains pressure rises as elevation falls and properties at the bottom of a hill often sit at the top of the acceptable range. A pressure test costs little and a limiting valve costs little more, the cheapest leak prevention available.
Pinpoint The Leak This Week In Cherrybrook
Instruments, evidence, one precise repair: and a bill that goes back to normal.
