Why Tree Roots in Pipes Are a Serious Problem in Melbourne
If you’re wondering how to get rid of tree roots in pipes, here’s the short answer: smaller intrusions can be treated with chemical root killers or mechanical cutting, but significant blockages require a licensed plumber using high-pressure water jetting or pipe relining to fully clear and protect your drainage system.
Melbourne’s established suburbs are lined with beautiful native gums, liquid ambers, and ornamental trees — and their root systems are relentless. Roots naturally seek out moisture, and your underground sewer and stormwater pipes are an irresistible target. Even a hairline crack in an older clay or PVC pipe is enough for a fine root tendril to push through, and once inside, it grows fast.
Left untreated, root intrusion leads to slow drains, gurgling toilets, sewage backups, and eventually collapsed pipes. The cost of ignoring the problem is almost always far greater than addressing it early.
How to Spot Tree Root Intrusion in Your Pipes
Tree root problems don’t always announce themselves dramatically. Often, the early warning signs are subtle and easy to dismiss. Knowing what to look for helps you act before a minor issue becomes a plumbing emergency.
Common signs of root intrusion include:
- Slow-draining sinks, showers, or bathtubs throughout the house
- Gurgling or bubbling sounds from your toilet or floor wastes
- Unpleasant sewage odours inside or outside your home
- Patches of unusually lush or green grass above your sewer line
- Recurring blocked drains that keep coming back despite clearing
- Visible sinkholes or ground subsidence in your yard
If you’re experiencing more than one of these symptoms at the same time, root intrusion is a very likely cause. A CCTV drain camera inspection is the most reliable way to confirm what’s happening inside your pipes.
How to Get Rid of Tree Roots in Pipes: Your Main Options
There are several approaches to dealing with root intrusion, ranging from DIY-friendly solutions to professional-grade techniques. The right method depends on the severity of the blockage, the age and material of your pipes, and how far the roots have spread.
1. Chemical Root Killers
Copper sulphate and foaming herbicide products (such as those containing dichlobenil or metam sodium) can be flushed through your toilet or cleanout access point. These chemicals kill root tissue on contact and slow regrowth. They work best as a preventative measure or for very early-stage intrusions, and they won’t clear a pipe that’s already heavily blocked. Always follow the product label carefully, as some chemicals can affect your garden soil and are subject to local use guidelines.
2. Mechanical Root Cutting (Electric Eel)
An electric eel — also called a drain snake or rooter — uses a rotating cutting head to physically slice through root masses inside the pipe. This is one of the most effective short-term solutions for moderate root blockages. You can hire an electric eel from most tool hire shops in Melbourne, but operating one incorrectly can damage older clay or concrete pipes. For anything beyond a straightforward blockage, this is better left to a professional.
3. High-Pressure Water Jetting
Hydro-jetting uses a powerful stream of water at high pressure to blast roots, debris, and built-up grease out of your pipes. It’s more thorough than mechanical cutting and leaves pipe walls cleaner, reducing the speed of regrowth. This method is almost always performed by a licensed plumber with specialised equipment. If you’re in Melbourne’s south-eastern suburbs, an emergency plumber in Cranbourne North can respond quickly with jetting equipment on the vehicle.
4. Pipe Relining
If roots have caused cracks or structural damage, pipe relining is often the most cost-effective long-term fix. A flexible resin liner is inserted into the damaged pipe and cured in place, creating a smooth, joint-free inner surface that roots cannot penetrate. It’s a no-dig solution that avoids costly excavation and is compliant with Australian standards for drain rehabilitation. Pipe relining is a permanent fix that protects your drainage system for decades.
5. Pipe Replacement
In cases where pipes have collapsed or deteriorated beyond repair — common with older terracotta or concrete sewer lines in Melbourne’s inner and middle-ring suburbs — full pipe replacement may be necessary. This is a more involved job, but modern PVC and HDPE pipes are far more root-resistant than the materials used in homes built before the 1980s.
Preventing Tree Root Intrusion in the Future
Once you’ve cleared the blockage, prevention is your best investment. Choose slow-growing, small-root-zone trees and shrubs when landscaping near your sewer or stormwater lines. Keep a buffer of at least three metres between large trees and underground pipes wherever possible.
Schedule a CCTV drain inspection every two to three years if you have mature trees on your property. Catching early root growth before it becomes a blockage saves you significant money and stress. You can also ask your plumber about root barrier products that can be installed along your pipe routes to deter root growth.
For homeowners in Melbourne’s growth corridors where new trees are being planted around recently built homes, it’s worth knowing that even new PVC pipes can develop joint weaknesses over time. Regular inspection is worthwhile regardless of your home’s age. Residents in areas like Lynbrook and Lyndhurst can reach a local emergency plumber in Lynbrook for a prompt inspection and assessment.
When to Call a Professional
DIY methods have their place for minor, early-stage root problems — but there are clear situations where you need a licensed plumber immediately. If your toilet is overflowing, multiple drains are backing up at once, or you can smell sewage inside your home, these are plumbing emergencies that require urgent professional attention.
You should also call a professional if chemical treatments or a hired electric eel haven’t resolved the blockage after one attempt. Repeated DIY efforts on a seriously root-affected pipe can cause further damage and make the eventual repair more expensive. A licensed plumber will use CCTV inspection to assess the exact condition of your pipes before recommending the right fix — whether that’s jetting, relining, or replacement.
The Plumbing & Roofing Company services Melbourne’s south-eastern suburbs with 24/7 availability and fixed pricing. If you’re dealing with a blocked drain or suspect root intrusion, contact our team today for fast, honest advice and a permanent solution. Homeowners in Narre Warren can also reach a local emergency plumber in Narre Warren South any time of day or night.
Conclusion
Tree root intrusion is one of the most common and damaging plumbing problems Melbourne homeowners face — but it’s also one of the most manageable when caught early. Understanding how to get rid of tree roots in pipes means knowing which solution matches the severity of your situation: chemical treatments and mechanical cutting for minor cases, and hydro-jetting or pipe relining for anything more serious.
Don’t wait for a full blockage or sewage backup before taking action. If you’re noticing slow drains, recurring blockages, or any of the warning signs listed above, reach out to The Plumbing & Roofing Company for a professional CCTV drain inspection and a clear, honest assessment of your options. Early action always costs less than emergency repairs.
Frequently Asked Questions
Can tree roots really grow into PVC pipes?
Yes, they can. While PVC is more resistant to root intrusion than older clay or concrete pipes, roots can still enter through joints, cracks, or poorly sealed connections. As PVC pipes age and experience ground movement, these entry points can develop — especially in Melbourne’s reactive clay soils.
How long does it take for tree roots to block a pipe?
It depends on the tree species, the proximity of the roots to the pipe, and whether there are existing cracks or joints for roots to exploit. In some cases, significant blockages can develop within two to three years of a tree being planted near a drain line. Aggressive species like willows and liquid ambers can cause problems even faster.
Is pipe relining covered by home insurance in Australia?
Coverage varies between insurers and policies. Some home and contents policies cover sudden and accidental damage to underground pipes, but gradual damage caused by tree root intrusion is often excluded. It’s worth checking your policy wording carefully and speaking with your insurer before assuming you’re covered.
How do I know if my blocked drain is caused by tree roots or something else?
The most reliable way to determine the cause is a CCTV drain camera inspection. A licensed plumber inserts a waterproof camera into your drain to view the pipe condition in real time. This confirms whether roots, grease buildup, a collapsed pipe, or a foreign object is responsible for the blockage — and guides the correct repair approach. For more about what we do, visit our homepage.
