Reline a Goodwood drain when the pipe is cracked, root-invaded or leaking at the joints but still structurally continuous. Replace it when the pipe has collapsed, sagged badly or pulled apart, because pipe relining needs an intact host pipe to line. A CCTV inspection settles which one you have.
I spent a decade on the tools before founding Exceed Plumbing & Air Conditioning, and the pipe relining Adelaide homeowners ask me about is mostly on drains under the older inner suburbs. This guide covers what each method involves, who owns the failed length, what the camera has to show, how long each option lasts, and when relining is the wrong call.
What Relining and Replacement Actually Involve
Relining rebuilds your drain from the inside without digging, while replacement digs the old pipe out and lays a new one. Here is what each job actually involves in practice:
Cured-In-Place Pipe Relining
Cured-in-place pipe relining works by inserting a resin-coated liner into the existing pipe and hardening it where it sits. Unitywater, the Queensland water utility, describes curing that liner with steam or hot water, and its 2025 program also used a polymer UV liner that is cured and sealed in position.
Once the resin sets you have a new pipe formed inside the old one. Lismore City Council reports that relining its sewer permanently seals the pipe and prevents roots from getting in, and that the work needed no digging up of roads, footpaths or landscaping.
That last point is why the method suits an established front garden. Access comes through existing openings rather than a trench cut across your lawn.
Full Pipe Replacement
Full pipe replacement is the traditional fix and it is still the right one often enough. A plumber excavates along the line of the drain, removes the failed length, lays new pipe to correct fall, then backfills and reinstates whatever sat above it.
It is the only answer once no sound host pipe is left to line, and it resets the entire run rather than repairing one section. The trade-off is what sits on top: paving, driveways, lawn and mature plantings.
A third method sits between the two. Water authorities including Lismore City Council use spiral winding, where a continuous PVC strip is mechanically wound into the host pipe through existing access points to form a new pipe inside the old one.
First, Work Out Whose Pipe It Is
The failed length may not be yours to pay for. SA Water separates the sewerage pipes on your property from its own infrastructure, and that boundary decides who actually pays:
- Pipes on your property are yours to investigate. SA Water advises contacting a licensed plumber to investigate a sewer blockage in the sewerage pipes on your property.
- SA Water’s own network is off-limits to plumbers. SA Water states plainly that plumbers are not allowed to work on any of its infrastructure. If your plumber finds the fault sits there, the job is to report it to SA Water and obtain a job number.
- There is a reimbursement pathway, and it has deadlines. SA Water’s plumbers’ claim scheme requires the plumber to have attended, found the fault in SA Water infrastructure, and reported it. Claims are lodged within 60 days of the work and processed within 20 days of the invoice date.
Skip this step and you can pay in full to reline a length that was never your responsibility, with no way back once the resin has cured.
What a CCTV Inspection Must Show Before You Decide
A quote written without camera footage is a guess. Before anyone can rule relining in or out, the inspection has to establish five things about the failed section of drain:
- Where the fault sits relative to the connection. That single measurement decides responsibility before it decides method.
- Whether the pipe is continuous or collapsed. Unitywater uses CCTV cameras to identify damaged pipes, and continuity is what the footage answers first. A cracked pipe still holds its shape; a collapsed one does not.
- The material and diameter actually in the ground. Housing age is a hint, never an answer. Only the camera tells you what your drain is made of.
- Where roots have entered, and through which joints or cracks. SA Water lists tree roots first among the causes of sewer blockages.
- How much of the run is affected. One cracked section and thirty metres of root-invaded pipe are different jobs with different answers.
Ask for the footage and the written report, not a verbal summary. With those five answers in front of you, the comparison below becomes a decision instead of a coin toss.
More: What Is a CCTV Drain Inspection and Do You Need One?
Relining and Replacement Compared
One table settles most of it. These are the five factors that genuinely change the answer on a residential drain, and none of them is a price on a website:
| Factor | Relining | Replacement |
| What it suits | Cracked, leaking or root-invaded pipe still holding its shape | Collapsed, sagging or badly misaligned pipe |
| Disruption | Existing access points; garden and paving untouched | Excavation, then reinstatement above |
| Time on site | Shorter; liner length and curing decide | Longer; dig depth and reinstatement decide |
| Cost drivers | Metres lined, junctions, access, curing method | Dig depth, surface above, machine access, spoil |
| What it cannot fix | A pipe with no continuous host wall left | Nothing structural |
Read it as two sets of conditions, not two products. Relining wins on disruption and loses on prerequisites. Unitywater states that lining existing pipes rather than excavating and replacing them is more cost effective and less disruptive, which holds only where a sound host pipe survives.
How Long Each Option Lasts
Lismore City Council puts a service life of 50 years on its relined sewer, the same order of magnitude as new pipe. Two numbers are worth understanding before you choose:
- Relined pipe carries a publicly stated 50-year service life. Lismore City Council relined more than 5 kilometres of sewer mains and 1.4 kilometres of laterals across four locations, and states that service life for the result. The figure comes from a council answering to ratepayers, not a contractor rating its own work.
- Replaced pipe resets the whole run. New pipe restarts the clock on every metre and every joint, not just the section that failed. That counts when a camera shows a drain failing in several places at once.
If your footage shows one failed section in an otherwise sound run, the lifespan argument does not justify digging up the yard. If it shows a run giving way in four places, replacement starts making sense on its own merits.
More: Why Do Drains Keep Blocking in Prospect?
When Relining Is the Wrong Choice
Relining cannot fix everything, and any plumber who says otherwise is selling. On each of these three findings, excavation and replacement is the correct repair rather than the fallback option:
- A fully collapsed section. Unitywater describes relining as forming a water-tight pipe within your pipe. Where the host wall has broken down there is nothing left to form against, and SA Water lists sewer line collapse among the causes of blockages for good reason.
- Severe misalignment or a dropped joint. A liner takes the shape of whatever it cures inside. Line a run with bad fall or a stepped joint and you have preserved the original fault in a newer material.
- A pipe crushed out of round. Deformation past a certain point stops a liner seating evenly against the host wall, and an unevenly seated liner is not a repair.
There is a fourth thing worth raising with your plumber. A liner sits inside the host pipe, so the finished internal diameter is smaller than what you started with, which is worth asking about on a run that was already tight.
The Verdict for a Goodwood Home
So what would I actually recommend on a Goodwood block? Reline if the camera shows a continuous host pipe, and replace if it does not, for three specific local reasons:
- The drains here are old. Arthur Hardy subdivided Goodwood Park in 1849, so these runs have had well over a century to develop faults.
- What sits above the pipe has real value. Goodwood sits 3 kilometres from the CBD in the City of Unley, where established gardens and paving are exactly what a trench destroys.
- Roots are the first cause SA Water lists. SA Water names tree roots ahead of every other cause of sewer blockages, and Lismore City Council reports that relining permanently seals the pipe against them.
My call: get a CCTV drain inspection done first, confirm whose pipe it is, then reline wherever a sound host pipe survives. Where the footage shows collapse, dig it out before paying for a liner that was never going to hold.
More: What Are the Common Causes of Blocked Drains?
Adelaide Suburbs We Service
Our licensed plumbers reline and replace drains across the Adelaide metropolitan area and the Adelaide Hills, and we run the camera before quoting either method on drains in these suburbs:
Our Goodwood plumbing team also covers Colonel Light Gardens, Mitcham, Norwood, Prospect, Linden Park, Magill, Burnside, Mawson Lakes, Salisbury, Elizabeth, Golden Grove, Modbury, Paralowie, Pooraka, Noarlunga, Morphett Vale, Happy Valley, West Lakes, West Beach, Fulham Gardens, Blackwood, Mount Barker and Stirling.
Every job starts with footage, never an assumption about the pipe.
Get Your Goodwood Drain Assessed Today
If a drain at your Goodwood property has backed up more than once, book a CCTV inspection with Exceed Plumbing & Air Conditioning on 0456 461 354 before choosing a method:
- Within-the-hour emergency response, 24/7
- Fixed upfront pricing, no hidden fees
- Fully licensed and insured (Licence 333997)
- Lifetime Labour Warranty on all workmanship
We quote pipe relining Adelaide-wide and replacement the same way: you get the footage, a written report and a fixed price against both, so the decision is yours.
Frequently Asked Questions
Is pipe relining worth it?
It is worth it where the camera shows a cracked or root-invaded pipe that still holds its shape, because your garden and paving stay intact. On a collapsed pipe it is money wasted.
How much does pipe relining cost in Australia?
Cost is driven by the metres lined, the number of junctions and bends, how accessible the run is, and the curing method. Ask for those four items itemised on your quote.
How long do relined pipes last?
Lismore City Council states a service life of 50 years for the sewer mains and laterals it relined. That is a public authority putting its name to the figure, not a contractor.
Why is pipe relining so expensive?
You are paying for CCTV diagnosis, cleaning and preparing the host pipe, the liner and resin, and a controlled cure using steam, hot water or UV light. None of those steps is generic.
Can every drain pipe be relined?
No. A liner needs a continuous host pipe to form inside, so a fully collapsed section, a severely misaligned or dropped joint, and a pipe crushed out of round all rule relining out.
Does Exceed Plumbing & Air Conditioning reline drains in Goodwood?
Yes. Exceed Plumbing & Air Conditioning relines and replaces drains throughout Goodwood and the wider Adelaide area, always starting with a CCTV inspection so you see the actual fault before choosing a method.
