Pool Leak Repair Cost: Detection and Fix Prices by Location

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Fixing a pool leak usually costs $150–$5,000+ in Australia, plus $150–$798 to find it. Where the leak is sets the price: a skimmer box injected for $250–$500, or replaced for $2,500–$4,500; a pipe under paving $1,500–$5,000+. All vendor-published. My pool is leaking: find it first, then price it.

The short answer

Detection: $150–$798 for a standard visit. One Queensland price list charges $440 for a full pool test and $330 for plumbing only; a national firm starts at $798 for two hours, then $168 per half hour.
Skimmer box: $250–$500 to inject, $2,500–$4,500 to replace, per one 2026 national cost guide. Replacement means digging out the surround.
Pipe under paving or a slab: $1,500–$5,000+, because the paving has to come up and go back down. A Melbourne pool-service firm publishes plumbing leaks at $500–$2,000+.
Concrete shell crack: $400–$900 a linear metre to inject; one guide puts shell cracks at $1,000–$5,000+, and full resurfacing at $10,000–$20,000.
A 160-litre-a-day leak wastes 58.4kL a year, worth $199 at Sydney Water’s $3.41 a kilolitre. A $440 detection visit pays back in about 2.2 years on water alone.

Pool leak repair cost by location: what the pump test points to, the usual repair, and the published price (vendor-published, read 30 September 2026)
Where the leak is	Pump-off / pump-on pattern	Usual repair	Published cost	Who publishes it
Finding it (leak detection)	—	Pressure test of the lines, dive inspection of the shell and fittings	$150–$500; $350–$600; $440 full test; $798 for two hours	Melbourne pool-service firm; national cost guide; SE Queensland detection firm; national detection firm
Accessible pipe or fitting at the equipment pad	Loses water with the pump on	Re-glue or replace the fitting or pipe section	$150–$300; equipment leaks $300–$800	National cost guide; Melbourne pool-service firm
Skimmer box	Static: loses water down to the skimmer level, pump on or off	Inject the crack or joint; replace the box if that fails	$250–$500 injection; $2,500–$4,500 replacement	National cost guide
Underwater light niche or its conduit	Static: loses water down to the light	Fill the conduit opening in the back of the niche with putty, silicone or caulk (SPASA); any wiring work by a licensed electrician	No leak-specific Australian price published; light replacement $300–$600	SPASA (method); national cost guide (replacement only)
Concrete shell crack	Static	Crack injection; resurface if the surface has failed	$400–$900 per linear metre; shell cracks $1,000–$5,000+; resurfacing $10,000–$20,000	National cost guide; Melbourne pool-service firm
Fibreglass or vinyl shell	Static	Gel coat repair; vinyl patch by a diver; liner replacement	Gel coat $350–$600; vinyl patch $150–$300; new liner $4,000–$7,000	National cost guide
Pipe under paving or a slab	Usually loses water only with the pump on (pressure leak)	Locate, excavate, replace the pipe, reinstate the paving	$1,500–$5,000+; plumbing leaks $500–$2,000+	National cost guide; Melbourne pool-service firm

My pool is leaking: what does it cost to find the leak?

Before anyone can price a repair, someone has to find the leak, and that is a separate bill. Four Australian businesses publish the price of finding one, and their figures run from $150 to $798 for a standard visit.

A leak detection firm serving south-east Queensland publishes a fixed price list: $440 for a full test of a pool and/or spa (interior and plumbing), $330 for the plumbing test alone, $330 for an interior dive inspection, $250 for a suction line test, and $500 for a pool with a spill-over spa. Repairs are quoted separately after the leak is found.
A national detection firm starts at $798 for the first two hours, then $168 per half hour, including GST. That covers a gas pressure test of four pipes and a dive inspection of the underwater fittings, with $38 for each extra pipe.
A Melbourne pool-service firm publishes detection at $150–$500, and a national cost guide dated February 2026 at $350–$600.

The quotable version: in Australia, finding a pool leak costs $150 to $798 on published price lists, before a cent is spent fixing it.

The bucket test costs nothing, and it tells you whether you need to spend that money at all. How to tell if your pool is leaking or just evaporating sets out the bucket test and the pump-on, pump-off comparison. Bring both results to the detection visit. A technician who already knows the loss is a pressure leak can skip the dive and go straight to the lines. If the pool is less than a few years old, read what to do when a new pool is leaking before you pay anyone: a leak on a new shell may be the builder’s defect to fix.

What each kind of pool leak costs to repair

The table above is the threshold table. Read it from the pump test across. A leak that shows only with the pump running points at the pipes, and the cost depends on whether those pipes are exposed or under paving. A leak that shows with the pump off points at the shell or something set into it.

Skimmer box. One 2026 national cost guide calls the skimmer a common failure point in Australia because of earth movement. It prices injection at $250–$500 and replacement at $2,500–$4,500, because replacement means excavating the surround. That tenfold gap is why the first repair attempt is almost always an injection.

Pipe under paving. The same guide puts a cracked pipe beneath pavers or a concrete slab at $1,500–$5,000+. Most of that is the digging and the reinstatement, not the pipe. This is where paying for accurate detection saves the most money: a pinpointed leak means lifting two pavers instead of a whole path.

Light niche. SPASA says underwater lights ‘can and do leak, especially the conduit that runs from the light niche to the junction box’, and that filling the opening of the conduit in the back of the niche with putty, silicone or caulk can often fix the problem. We found no Australian price for that repair. The only published number is $300–$600 to replace an underwater light, which is a different job. The conduit carries the light’s power cable, so any work on the light’s wiring is for a licensed electrician.

Shell. Concrete crack injection is published at $400–$900 per linear metre. A fibreglass gel coat crack is $350–$600. A diver’s vinyl patch is $150–$300. If the surface itself has failed, the job becomes a resurface: see what pool resurfacing costs, and for fibreglass, fibreglass pool problems and what to check.

The quotable version: the pipe is cheap and the paving is expensive, so a leak under a slab costs ten times a leak at the equipment pad.

Is it worth paying for leak detection? The litres-to-dollars test

A leak is priced in water first. The conversion is: litres a day × 365 ÷ 1,000 = kilolitres a year, then multiply by your water rate. Your bucket test gives you the litres (surface area in square metres × the extra millimetres the pool dropped).

Worked example. An 8m × 4m pool (32 m²) drops 5mm a day more than the bucket. That is 160 litres a day, or 58.4 kilolitres a year.

At Sydney Water’s 2026–27 usage price of $3.41 a kilolitre: $199.14 a year.
In Perth, for a household already past Water Corporation’s 150 kL tier 1 for the bill year (the ABS average WA household uses 243 kL), at the tier 2 price of $2.809: $164.05 a year.
In Melbourne, at Yarra Valley Water’s step 2 price of $5.0268 (water and sewer usage combined): $293.57 a year.

Against a $440 full-test price, that is a payback of about 1.5 years in Melbourne, 2.2 years in Sydney and 2.7 years in Perth, on water alone. At the $798 two-hour rate it is about 4 years in Sydney.

Water is the smallest part of the case. Every litre that leaks takes dissolved chemical with it, and a pressure leak underground can wash out the fill under paving or a shell. That damage costs far more than the water. SPASA’s own scale is that one drop per second adds up to 7,000 litres a year.

The litres-to-dollars rule: if your leak is more than about 100 litres a day, detection pays for itself in water within a few years, before you count chemicals or ground damage. Below about 1mm a day, re-run the bucket test before you pay anyone, because that is within the error of marking a line.

Can I fix a pool leak myself?

Some of it. The honest split:

Yes, usually: a dripping union or a cracked fitting at the pump and filter, if it is above ground and you can see the water. The national guide’s $150–$300 for this job is mostly the call-out, and it quotes technician call-outs at $80–$120 plus $80–$110 an hour.
Possibly: a small vinyl liner tear, with an underwater patch kit, or a leaking light conduit sealed from inside the niche as SPASA describes, without touching the wiring.
No: anything involving the light’s wiring (licensed electrician), anything under paving (you need the leak located first), and anything that involves draining the pool. The same guide warns that draining a pool with a high water table can push the shell out of the ground, which it describes as often needing total replacement.

On a pool built in the last few years, do not patch anything before the builder has inspected it; what to do when the builder has not fixed the defects covers that route. If the answer is a resurface or a renovation rather than a repair, compare quotes on identical scope: free pool quotes and what a pool renovation costs.

Common questions

How much does pool leak detection cost in Australia?

Published prices run from $150 to $798 for a standard visit. One south-east Queensland firm’s price list charges $440 for a full pool test and $330 for the plumbing test alone. A national firm starts at $798 for the first two hours, then $168 per half hour.

How much does it cost to fix a leaking skimmer box?

One national cost guide dated February 2026 publishes $250–$500 for injection repair and $2,500–$4,500 for replacement, because replacement means excavating around the box. Most repairers try injection first.

How much does it cost to fix a pool pipe leak under paving?

About $1,500–$5,000 or more on the same national guide, most of which is lifting and relaying the paving. A Melbourne pool-service firm publishes plumbing leak repairs at $500–$2,000+. Accurate detection keeps the dig small.

How much water does a small pool leak waste?

SPASA says one drop per second equates to 7,000 litres a year. A leak of 5mm a day on a 32 m² pool is 160 litres a day, or 58.4 kilolitres a year, which costs $199 at Sydney Water’s 2026–27 price of $3.41 a kilolitre.

Do I need a pool leak detection kit?

Not to find out whether you have a leak. The bucket test uses a bucket and a marker and costs nothing. Dye kits help pinpoint a leak once you know roughly where it is, such as a crack or a fitting, but they do not replace a pressure test for pipes underground.

Sources

General information only, current at 2026-09-30. Pool rules differ by state and by council, and penalty amounts are updated regularly. Confirm your own obligations with your council or a registered inspector before acting.

How much does it cost to fix a pool leak?