If you’ve been told your drain needs pipe relining, one of the first things you’ll probably want to know is how much it costs per metre. Well, the answer isn’t always as straightforward as a single dollar figure.
Pipe relining is usually priced with a per-metre component, but that’s only part of the overall quote. Every property is different, and so is every drain. The condition of the pipe, how easy it is to access, whether it needs cleaning first, what a CCTV drain inspection reveals, and even the number of bends and junctions can all influence the final cost.
In this guide, we’ll explain what pipe relining involves, why prices vary, and what to look for when comparing quotes. By understanding what goes into the job, you’ll be in a much better position to make an informed decision before any work begins.
What Is Pipe Relining?
Pipe relining is a repair method that restores certain damaged drains without digging up the entire pipe. Instead of removing the existing pipe, the plumber inserts a flexible liner coated with a specialised resin into the damaged section. Once the liner is in place, it’s inflated and left to cure, creating a durable new pipe inside the old one.
The result is a smooth internal surface that can help restore the pipe’s function while avoiding extensive excavation in many situations. Note, however, that pipe relining isn’t suitable for every drain. The existing pipe has to be in suitable condition to support the new liner, which is why an inspection is necessary.
Pipe Relining vs Pipe Replacement
Pipe replacement involves excavating the damaged pipe and installing a new one. While this remains the right solution for some situations, it can involve significant disruption if the drain runs beneath a driveway, garden, retaining wall, or building.
In pipe relining, the pipe is repaired from the inside, so there’s less digging required. That can mean less disruption to established landscaping and paved areas. However, if the pipe has collapsed, shifted badly, or suffered severe structural damage, replacement may still be the better option.
When Pipe Relining Is Usually Considered
Relining is commonly considered where CCTV inspections identify cracks, leaking joints, recurring tree root intrusion, or damaged clay pipes. It can be suitable for sewer or stormwater drains beneath finished surfaces where excavation would be difficult.
A drain camera inspection identifies the exact location and extent of the damage while determining whether pipe relining is a suitable repair option.
So, How Much Does Pipe Relining Cost Per Metre?
Residential pipe relining is often discussed in terms of hundreds of dollars per metre, but that figure should only be treated as a guide. Short repairs often have a higher average cost per metre because the setup costs are spread across fewer metres.
A pipe relining quote includes more than just the length of the repair. It reflects factors such as the inspection findings, amount of preparation required, and complexity of the work.
Why the First Metre Can Cost More
People are sometimes surprised that a short repair can have a relatively high average cost per metre. That’s because the first metre includes much of the setup work.
The crew still needs to attend the property, inspect the drain, prepare equipment, clean the pipe, mix the resin, and complete the curing process. It doesn’t matter if the repair is two metres or 10; many of those preparation steps remain the same.
Why Longer Pipe Runs May Cost Less Per Metre
Once the equipment has been prepared and the repair is underway, extending the liner through a longer straight section can sometimes reduce the average cost per metre. That doesn’t mean every long repair is less expensive overall. Multiple bends, junctions, restricted access, and difficult pipe conditions can still increase labour and material costs.
What Affects the Cost of Pipe Relining?
Pipe length is only one part of the pricing equation. Several factors influence the amount of labour, preparation, and specialised equipment required.
Pipe Length and Diameter
Longer repairs generally require more liner material, resin, and installation time. Larger-diameter pipes can also require additional materials and specialised equipment. An accurate inspection helps determine which section of the pipe needs attention. In some cases, only the damaged section requires relining.
Access Conditions
Plumbers need practical access to inspection openings, boundary traps, pits, or other entry points before relining can begin. Tight work areas or locations where equipment is difficult to position may require additional preparation, even if excavation isn’t necessary.
Pipe Condition
The existing pipe needs enough structural integrity to support the liner. Minor cracks, root intrusion, and leaking joints can often be addressed through relining after proper preparation.
Roots, Cracks and Offset Joints
Tree roots usually need to be cut away before the pipe is cleaned thoroughly. Cracks and offset joints also need careful assessment using CCTV equipment to determine whether relining is likely to produce a lasting repair.
Collapsed or Severely Damaged Pipes
If the pipe has collapsed, is badly deformed, or has missing sections, relining may not be appropriate. In those situations, excavation or partial replacement may be required before any relining work can be considered.
Cleaning and CCTV Inspection
Hydro jetting or mechanical cleaning removes grease, roots, scale, and debris so the liner can bond properly with the pipe. The CCTV drain inspection then confirms the pipe’s condition, measures the repair length and identifies bends, junctions, and any structural issues that could affect the repair.
Bends, Junctions, and Branch Lines
Straight sections of pipe are generally easier to reline than drains containing several bends or branch connections. Junctions often require reinstatement after the liner has cured so connecting pipes continue flowing properly. Additional labour and specialised equipment can influence the overall cost, even where the total pipe length remains the same.
Does Pipe Location Affect Whether Relining Is Worth It?
The location of the damaged pipe often determines whether relining provides better value than excavation. If it’s beneath a lawn, it may be straightforward to replace.
But if the pipe sits beneath a driveway, tiled outdoor area, retaining wall, or established landscaping, excavation may involve additional restorative work after the plumbing repair has been completed.
While relining isn’t automatically the lower-cost option, avoiding major reinstatement can make it an attractive solution for many properties.
Pipe Relining for Sewer and Stormwater Pipes
Sewer pipes often involve wastewater flow, branch connections, and compliance considerations, while stormwater drains may contain silt, debris, and surface water. Stormwater drainage systems can also include pits that help collect and manage surface water around a property.
Understanding the role of stormwater drainage pits can be useful when assessing drainage problems. Each system has its own challenges, and a CCTV inspection helps determine the most suitable repair based on the drain’s actual condition.
When Pipe Relining Is Worth the Cost
If tree roots, structural cracks, or blockages continue to cause problems, pipe relining may be the answer. It can also offer significant value when damaged pipes run beneath finished surfaces that would otherwise require extensive excavation.
However, relining isn’t designed for every drainage issue. Some drains only need professional clearing, while others with severe structural damage may require replacement. Your trusted plumber can recommend the repair method that’s most suitable for your pipes.
How to Compare Pipe Relining Quotes
A detailed quote should explain what’s included, such as CCTV inspection, drain cleaning, liner length, pipe diameter, junction reinstatement, warranty information, inspection footage, and any possible excavation requirements if relining proves unsuitable. Comparing the scope of work and the price helps you make a more informed decision.
Pipe Relining Cost: Get a Clear Price Before You Dig
Pipe relining cost per metre is a useful starting point, but it’s only part of the overall cost. Factors that contribute to the final quote include pipe length, diameter, access, condition, cleaning requirements, CCTV findings, bends, and junctions. The most reliable way to understand your repair options? Have your drain inspected professionally.
If you live in Logan, Brisbane Southside or nearby Queensland suburbs, contact Drain Defenders. Our experienced plumbers will conduct a CCTV drain inspection to assess the condition of your drain before recommending whether pipe relining or another repair method is most appropriate.