What to Do Right Now
If a pipe has burst and water is flowing, act immediately:
- Turn off the water at the mains. The shutoff is usually at the meter near the street boundary, in a concrete or plastic cover. Turn the valve clockwise to close. If it is seized, a meter key from any hardware store will help.
- Switch off the power if water is near electrical outlets or the switchboard. Do not touch wet electrical fittings.
- Open the lowest tap in the house to drain residual pressure from the pipes.
- Move furniture and valuables away from the affected area.
- Document the damage with photos and video for your insurer before any cleanup.
- Call a licensed plumber. If it is after hours and the water is isolated, you can wait until business hours to save on emergency callout fees.
What's Included
A standard burst pipe repair covers diagnosis, isolation of the water supply, pipe repair or section replacement, and pressure testing to confirm the fix holds. All work must comply with AS/NZS 3500 Plumbing and Drainage (updated April 2025, mandatory from October 2025). The standard covers water services (Part 1), sanitary plumbing and drainage (Part 2), stormwater drainage (Part 3), and heated water services (Part 4), and applies to repairs, alterations, and additions to existing installations, not just new work.
For accessible pipes, the job involves cutting out the damaged section and joining new pipe with compression fittings, crimp rings, or soldered joints depending on material. In-wall or under-slab repairs add wall opening or concrete cutting, pipe rerouting where needed, and basic patching of access points. After-hours jobs include an emergency callout fee on top of the repair cost. CCTV inspection is quoted separately if the leak source is not immediately visible. Cosmetic reinstatement of plaster, paint, or tiling is not part of the plumbing scope and requires a separate trade.
Under AS/NZS 3500.1, all repaired or replaced water services must be pressure tested to at least 1,500 kPa (1.5 times maximum working pressure) for a minimum of 15 minutes before being returned to service. A good plumber will show you the gauge reading and leave it connected during the test so you can see it holds steady.
Pipe Materials: What's in Your Walls
The material of the failed pipe determines repair complexity, cost, and whether a spot fix or full repiping makes more sense. Australian homes contain a mix of materials depending on when they were built.
| Material | Era | Cost per Metre (Supply) | Typical Failure Mode | Repair Approach |
|---|---|---|---|---|
| Galvanised steel | Pre-1960s | $6–$10/m | Internal rust, restricted flow, pinhole leaks | Usually needs full run replacement. Corrodes from the inside out, so a burst signals the whole run is failing. |
| Copper (Kembla or equivalent) | 1950s–2000s | $12–$25/m | Pinhole leaks from pitting corrosion, joint failures, dezincification of brass fittings | Section replacement with soldered or compression joints. Can be spot-repaired if the rest of the run is sound. |
| PEX (Rehau RAUTITAN, Auspex, Tradepex) | 2000s–present | $8–$15/m | Rare failures, mostly fitting-related, UV degradation if exposed to sunlight | Crimp or compression fitting replacement. Fastest and cheapest repair. |
| CPVC | 1980s–2000s | $5–$8/m | Brittle with age, splits at fittings | Section replacement with solvent cement joints. Becoming uncommon. |
| Polyethylene (PE/poly) | 1970s–present (external) | $4–$8/m | Joint failures, UV degradation on exposed sections | Compression or electrofusion joints. Common for external supply lines from the meter. |
PEX now accounts for around 60% of new residential plumbing in Australia. If your home has original galvanised steel or early copper supply lines and one section has failed, ask your plumber to inspect the full run. A single burst on galvanised pipe is usually a warning that the entire line is approaching end of life.
Repair Methods Compared
Not all burst pipe repairs are the same job. The method depends on the pipe material, location, and how much of the run is compromised.
| Method | Typical Cost | When It's Used | Durability |
|---|---|---|---|
| Patch clamp (emergency wrap) | $80–$150 (clamp kit) + labour | Temporary fix on a clean hole in otherwise sound pipe | Short-term only. Buys time until a permanent repair. Not code-compliant as a final fix. |
| Section replacement | $200–$800 (accessible), $600–$2,000+ (concealed) | Standard repair. Cut out the damaged section, join new pipe with appropriate fittings. | Permanent. The repaired section is as strong as new pipe. |
| Full run repiping | $2,000–$6,000+ per run | Galvanised steel or copper runs with widespread corrosion. When spot repairs keep recurring. | Permanent. Eliminates the root cause. Typically done in PEX for cost and speed. |
| Pipe relining (epoxy) | $500–$3,000 per section | Drain and sewer pipes, not typically used for pressurised water supply lines | 50+ year manufacturer warranty. Avoids excavation. |
For pressurised water supply lines, section replacement is the standard permanent repair. Patch clamps are a temporary measure only and should be followed up with a proper repair within days.
Leak Detection: Finding What You Can't See
When the leak is hidden, under a slab, inside a wall, or underground, finding the source before cutting anything open saves time and money.
| Detection Method | Typical Cost | Best For |
|---|---|---|
| Acoustic listening | $250–$450 | Pressurised water supply leaks. Sensors detect the sound of water escaping from the pipe. Non-invasive. |
| Thermal imaging | $300–$500 | Hot water pipe leaks (warm spots on walls or floors). Also detects moisture patterns behind wall linings. |
| Tracer gas (hydrogen-nitrogen mix) | $450–$750 | Stubborn leaks in complex pipe runs. Safe gas is injected into drained pipes and a sensitive detector finds where it escapes. |
| CCTV camera inspection | $250–$550 | Drain and sewer pipes. Shows root intrusion, cracks, joint displacement. Not used for small-diameter water supply pipes. |
| Correlation detection | $450–$750+ | Under-slab or long-run leaks. Two sensors placed on the pipe measure time delay to pinpoint the leak location precisely. |
A good plumber will start with the simplest method (acoustic or thermal) and escalate to tracer gas or correlation only if the source remains unclear. Specialist leak detection is sometimes billed separately from the repair itself.
Signs You Have a Burst or Leaking Pipe
Some leaks are obvious. Others reveal themselves gradually:
- Unexplained water bill increase. A sudden jump with no change in usage almost always means a leak somewhere in the system.
- Damp patches on walls, ceilings, or floors. Discoloured paint, bubbling wallpaper, or soft plaster near pipes.
- Musty or mouldy smell. Persistent dampness behind walls creates mould growth you can smell before you see it.
- Warm spots on the floor. A hot water pipe leak under a slab heats the concrete above it.
- Water meter ticking over when all taps are off. Turn off every tap and appliance in the house, then check the meter. If the dial is still moving, water is flowing somewhere it should not be.
- Low or fluctuating water pressure. A burst reduces pressure downstream of the failure point.
- Hissing or running water sounds. Audible through walls or floors, particularly at night when the house is quiet.
If you suspect a slow leak, check your water meter before bed and again first thing in the morning without using any water overnight. Any movement confirms a leak.
What Affects the Cost
- Pipe location and accessibility. Exposed pipes under a sink cost a fraction of pipes buried in a slab or inside a wall cavity. Under-slab repairs require concrete cutting ($1,000–$3,000+ for access and reinstatement alone).
- Time of callout. Emergency after-hours callout fees run $150–$300 on top of the repair cost, with hourly labour rates 50–100% higher than business hours. Weekend and public holiday premiums are higher again.
- Pipe material. Galvanised steel and older copper repairs are more complex and expensive than PEX. Older materials may need adapters, transition fittings, or longer sections replaced.
- Extent of damage. A pinhole leak on an otherwise sound pipe is a quick fix. A fully burst section requiring metre-plus replacement with wall or slab access is a half-day job.
- Secondary damage. Water damage to walls, ceilings, or flooring is not included in the plumbing quote but affects total project cost. Allianz claims data shows the average water damage insurance payout has increased to over $30,000, driven by materials and labour cost inflation.
- CCTV or specialist leak detection. Required for concealed leaks, particularly under-slab, adding $250–$750 to the diagnostic cost.
A visible burst on an accessible copper pipe under a sink in a newer property sits toward $200. A concealed leak under a concrete slab requiring specialist detection, excavation, pipe rerouting, and slab reinstatement pushes toward $2,000.
If the pipe has burst and water is actively flowing, this is an emergency. After-hours, weekend, and public holiday callouts carry premium rates that add significantly to the total. If you have turned off the water at the meter and there is no active damage spreading, scheduling the repair during business hours saves money.
Insurance: What's Covered and What's Not
Most Australian home insurance policies cover sudden pipe failures and the resulting water damage, but not gradual deterioration:
- Covered: Sudden burst, flexi hose failure, joint blowout, and the water damage they cause (flooring, walls, cabinetry).
- Not typically covered: Gradual leaks, corrosion-related failures in old pipes, tree root intrusion, wear and tear, poor maintenance.
- Grey area: Failure of pipes that were visibly corroded or past their expected lifespan. Some insurers dispute these claims.
Document all damage with photos and video before any cleanup. Your insurer will need evidence of the damage and the cause. Keep the failed pipe section if possible, as the insurer may request it. Contact your insurer within 24 hours.
The plumbing repair itself is usually a small fraction of the total insurance claim. Water damage restoration (drying, mould treatment, replastering, repainting, flooring replacement) typically accounts for the bulk of the cost. If a burst occurs in or near a wet area, the waterproofing membrane may also need inspection and repair.
City and Regional Price Comparison
Repair costs vary across Australian capitals, driven by trade labour pool size, typical construction methods, water hardness, and housing age.
City-level differences. Sydney pricing serves as the national baseline at $200–$2,000 per job. Melbourne tracks close to Sydney rates. Brisbane is often comparable or slightly lower, partly because raised Queenslander homes provide easier subfloor pipe access. Perth and Adelaide generally run 10–15% higher due to smaller trade labour pools. Perth's limestone-heavy water supply causes aggressive pipe scaling that accelerates failures. Adelaide's Murray River-sourced water (hardness 90–160 mg/L) has a similar corrosive effect on ageing copper and galvanised pipe.
Suburb and regional variation. Within any city, the price range shifts based on property age, pipe material, and access difficulty. Inner-city terraces in Sydney's Balmain or Melbourne's Fitzroy with original galvanised steel pipes buried in double-brick walls sit toward the high end. Newer estates in Brisbane's north corridor or Perth's southern suburbs with PEX plumbing and accessible subfloors trend toward the low end. Properties on concrete slabs, common in post-1970s Adelaide and Perth suburbs, cost more than raised-floor homes because reaching buried pipes means cutting and reinstating concrete.
How We Calculate
Estimates are based on current licenced plumber rates in each capital, adjusted for regional labour costs, typical property age, and common pipe materials. All figures include GST. Prices reflect standard residential repairs. Commercial, multi-storey, or heritage-listed properties may fall outside these ranges.