Simple locates, $200–$400
Short runs, decent access, leak confirmed and marked without drama.
Precision Leak Location
Water Leak
Detection In
Manly
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 Manly 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
- Found and fixed by the same crew
Three Instruments, One Answer, In Manly
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 Manly’s older homes, where pipes wander in ways no plan ever recorded, and the "obvious" place to dig is reliably wrong.
Sandy ground hides leaks better than anything else
Wind-blown and washed-in sand collects in beachside stormwater pits and lines, a leading cause of blockages across Manly.
Sand drains freely, which means a leak that would create an obvious wet patch in clay produces nothing visible at all. The water simply goes down and away, and the first sign is the bill.
It is the main reason we rely on the meter test and acoustic work here rather than looking for surface evidence. Absence of a wet patch proves very little in this ground.
Is it a leak, or is it the weather?
Salt-laden ocean air corrodes older metal fittings and joints, weakening pipes and causing leaks and recurring blockages.
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.
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.
Blocks around the Corso and beachfront share ageing stacks that clog with grease, fat and wipes, needing a proper hydro-jet clear.
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.
Smell as evidence
Older beachside cottages still run original clay drains that crack and dip with age and tree roots, snagging debris and backing up.
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.
What the water is doing to the ground itself
A leak running into sandy ground does not just disappear, it moves material. Over months it can wash fines away from under pavers, a driveway or a slab edge, and the first structural sign is a section that has started to sink.
Manly sits on Sydney’s Northern Beaches (postcode 2095), on a narrow neck of land between the ocean and harbour, bordering Fairlight, Balgowlah and Freshwater. Its beachside apartments, older cottages and constant sand and salt make for demanding coastal drainage work.
If something outside has settled unevenly and there is no obvious reason, a leak upstream of it is a legitimate suspect and worth ruling out before anything gets relaid.
Whose leak is it in an apartment?
The technical question and the financial question have different answers, and both need settling. Pipework serving only your lot is yours; risers, mains and common-property lines belong to the owners corporation.
A leak detection report that names the line, the lot and the direction of travel is what turns a dispute into a decision. That is what we write, because a description of where the water appeared settles nothing.
What it costs in Manly
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.
How A Detection Visit Runs
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?
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.
Very possibly, and it is worth ruling out first. A cistern leaking internally wastes thousands of litres a quarter silently. Put a few drops of food colouring in the cistern, wait twenty minutes without flushing, then look in the pan. Colour in the bowl means the outlet valve is passing, usually a cheap part.
It is a legitimate suspect. A leak running into sandy ground moves material, washing fines out from under pavers, a driveway or a slab edge over months. If something outside has settled unevenly with no obvious reason, rule out a leak upstream before anything is relaid.
Close to the water the ground is often wet regardless of any fault, which removes the most obvious diagnostic. So detection here leans on isolation and the meter rather than observation, and on tracer gas where a leak is genuinely masked by ambient groundwater.
Often not. Water tracks along the top of a slab and through penetrations, sometimes several metres laterally before entering your ceiling. Thermal imaging and moisture mapping from below usually establish the direction it is arriving from before anyone needs access to a neighbour's bathroom.
Usually 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. Unglamorous, cheap, and conclusive in a way that sniffing around is not.
Locate It This Week Anywhere In Manly
Non-invasive detection, evidence before quotes, and one crew for the find and the fix.
