Collapsed Drain

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Licensed plumbers across Adelaide, Perth & Brisbane

G★★★★★
4.6 · 2,000+ Google reviews

A collapsed drain causes repeated blockages, slow drainage, soggy ground and backups that clearing alone will never fix. Our licensed plumbers confirm and locate the collapse exactly with a CCTV camera, then repair it the right way, relining the pipe from the inside without digging where it is cracked but intact, or excavating and replacing a fully collapsed or missing section, pinpointed so we dig only where needed. We find the real cause so the problem stops for good, rather than treating recurring symptoms. We repair collapsed drains across Brisbane, Perth and Adelaide, with same-day assessment where we can and an upfront fixed price.

Why choose Same Day Trades for a collapsed drain

We are local, licensed and insured plumbers who do this work every day, so we get it right the first time, with no mess and no surprises on the invoice.

Fully licensed and insured plumbers
Upfront fixed pricing before we start
Same-day service where we can, with 24/7 phones
Workmanship guaranteed and the job left clean
Servicing Brisbane, Perth and Adelaide

Whatever the job, you get honest advice and a tidy, professional result.

Signs of a collapsed drain

A collapsed drain is a serious problem, and the signs are usually unmistakable once you know them:

Repeated blockages that keep coming back no matter how often the drain is cleared
Very slow drainage across the property
Sinkholes or sunken ground over the drain line
Soggy, boggy patches or pooling in the yard
Sewage smells inside or outside
Backing up of water or waste into fixtures

A drain that keeps blocking despite clearing, combined with any of these, strongly suggests a collapse. We confirm it with a camera and repair it properly across Brisbane, Perth and Adelaide.

What causes a drain to collapse

Drains collapse for several reasons, usually a combination of age and external stress. Age and corrosion weaken older pipes, especially earthenware and metal, until they crack and cave in. Ground movement, from soil shifting, drying and swelling, or nearby excavation, cracks and displaces pipes. Tree roots grow into and crack pipes, and over time contribute to collapse. Heavy loads above shallow pipes, such as vehicles driving over them, can crush them. Poor original installation, inadequate bedding or support, also leads to failure. Because a collapse is often the end result of long-term deterioration, it frequently follows a history of recurring blockages, and a camera inspection reveals the extent.

Why collapsed drains keep blocking

The hallmark of a collapsed or collapsing drain is a blockage that keeps returning no matter how often it is cleared. When a pipe cracks and caves in, or partially collapses, it narrows or deforms the pipe and creates edges and debris that catch waste, so blockages form again and again at the same spot. Clearing the blockage gets things flowing briefly, but the collapsed section remains, so it re-blocks within days, weeks or months. This is why repeatedly clearing a drain that keeps blocking is a false economy, the real problem is the damaged pipe. A camera inspection shows the collapse, so it can be repaired and the recurring blockages stopped for good.

Confirming a collapse with a camera

The only way to confirm a collapsed drain and assess its extent is to see inside the pipe with a CCTV drain camera. We feed a waterproof camera through the drain and view a live feed, which shows whether the pipe is cracked, partially collapsed, fully caved in, or has a section missing, and pinpoints the exact location and depth, often with a locator from the surface. This is essential before any repair, because it tells us whether the pipe can be relined or must be excavated, and exactly where to work. You can see the footage yourself, so you understand the problem and why the recommended repair is needed, rather than taking it on trust.

Can a collapsed drain be relined?

Whether a collapsed drain can be repaired with no-dig relining depends on how badly it has failed. If the pipe is cracked, fractured or only partially collapsed but still essentially continuous, relining, inserting a resin liner that cures into a new pipe inside the old one, can often repair it without excavation, which is faster and less disruptive. However, if the pipe is fully collapsed, has a section missing, or is severely misaligned so a liner cannot pass through or form properly, relining is not possible and excavation is needed. The camera inspection tells us which applies. We will advise honestly whether your collapsed drain can be relined or needs digging up.

Excavation and replacement

When a drain has fully collapsed, has a missing section, or is too badly damaged to reline, the solution is to excavate and replace the affected section of pipe. While more disruptive than relining, it is the only reliable fix for a severe collapse, and done properly it restores the drain to as-new condition. Because we locate the collapse precisely with the camera first, we dig only where needed, minimising disruption to your yard, driveway or floor, and we reinstate the surface afterwards. We lay the new pipe with correct bedding, support and fall, so the repaired section is sound and properly installed, not prone to collapsing again like a poorly laid original pipe.

Sinkholes and ground subsidence

A collapsed drain can cause, or be revealed by, sinkholes and subsidence in your yard. When a drain collapses or leaks, water escapes into the surrounding ground and washes away soil, creating voids that eventually cave in as sinkholes or sunken, soft patches over the pipe line. A sinkhole or an area of ground that has dropped is a strong sign of a collapsed or badly leaking drain beneath. This is not just a drainage problem but a safety and property concern, as the subsidence can undermine paths, paving and structures. We investigate sinkholes and subsidence over drain lines with a camera, and repair the collapsed pipe to stop the soil loss and ground movement.

Tree roots and collapse

Tree roots are both a cause of drain collapse and a problem that must be dealt with during repair. As roots grow into a pipe through cracks and joints, they widen the damage over time, contributing to the eventual collapse, and a collapsed drain near trees is very often root-related. Simply excavating and replacing, or relining, without addressing the roots risks the same problem returning. We clear roots as part of the repair, and where we reline, the new seamless liner seals the cracks and joints so roots cannot re-enter that section. We also advise on the root situation, so the repaired drain is protected against the roots that contributed to the collapse.

How urgent is a collapsed drain?

A collapsed drain should be addressed promptly rather than left. It causes recurring blockages and backups that only worsen as the collapse progresses, it can lead to sinkholes and subsidence that undermine your property, and if it is a sewer drain, the escaping waste is a health hazard and the source of smells. A partial collapse also tends to become a full one over time. While it may not be a flooding emergency in the way a burst water pipe is, leaving a collapsed drain leads to worsening problems and larger, more expensive repairs. Getting it diagnosed and repaired promptly limits the damage and the cost, and stops the ongoing blockages and backups.

The repair process

We handle a collapsed drain repair end to end. First, a camera inspection confirms and locates the collapse and assesses its extent. We then recommend the right repair, relining if the pipe is intact enough, or excavation and replacement if it is fully collapsed, with an upfront price. For excavation, we dig only at the located spot, remove the collapsed section, lay new pipe with correct bedding and fall, and backfill and reinstate the surface. For relining, we clean and prepare the pipe, then install and cure the liner. Finally, we run the camera through again to confirm the repair. We clean up and leave your drain sound and free-flowing.

How much does it cost?

The cost of repairing a collapsed drain depends on the location and depth of the pipe, the extent of the collapse, and the repair method, relining versus excavation. A camera inspection lets us give you an accurate, upfront fixed price, because we know exactly what is wrong and where before quoting. Relining, where possible, is often cheaper overall than excavation once you factor in reinstating driveways, paving and landscaping. A deep or extensive collapse needing excavation is a larger job. We explain the options and costs clearly, so you can make an informed decision, and we locate the collapse precisely to keep any digging, and the cost, to a minimum.

Preventing drain collapse

While age eventually catches up with any drain, you can reduce the risk of collapse and catch problems early. Act on recurring blockages rather than just clearing them repeatedly, as they are often an early warning of a cracking, failing pipe. If you have large trees near drain lines, periodic camera checks and preventive maintenance keep roots in check before they crack and collapse the pipe. Avoid heavy vehicle loads over shallow drains. For older properties, a camera inspection can reveal deteriorating pipes before they collapse, allowing a planned reline rather than an emergency excavation. Addressing problems early, while the pipe is cracked rather than collapsed, is far cheaper and less disruptive.

Same-day assessment

If your drain keeps blocking, you have sinkholes or soggy ground, or you suspect a collapse, the sooner it is assessed the better, before it worsens. We offer fast service and can usually attend the same day across Brisbane, Perth and Adelaide to carry out a camera inspection and confirm whether the drain has collapsed, with phones answered around the clock. Once we know the extent, we give you an upfront price for the right repair, relining or excavation. Rather than paying to clear a drain that keeps blocking, a same-day inspection gets to the real cause, so the collapse can be properly repaired and the recurring problems stopped.

Licensed, guaranteed drain plumbers

Repairing a collapsed drain takes the right equipment, cameras, relining gear and excavation capability, and a licensed plumber who correctly diagnoses the extent and chooses the right repair. Our team is fully licensed and insured, we confirm the collapse with CCTV, reline or excavate and replace as appropriate, address any tree roots, and confirm the repair on camera, and we back our work. You get an accurate diagnosis, honest advice on relining versus excavation, upfront fixed pricing, and a drain repaired to last. For a plumber near you for a collapsed drain, we cover Brisbane, Perth and Adelaide.

Collapsed drain FAQs

How do I know if my drain has collapsed?

Signs include drains that keep blocking despite clearing, very slow drainage, sinkholes or sunken ground, soggy patches and sewage smells. A camera inspection confirms a collapse.

What causes a drain to collapse?

Age and corrosion, ground movement, tree root damage, poor installation, and heavy loads (like vehicles) over shallow pipes all cause drains to crack and collapse.

Can a collapsed drain be fixed without digging?

Sometimes. If the pipe is cracked but not fully collapsed, no-dig relining may work. A fully collapsed or missing section usually needs excavation. A camera inspection tells us which.

How do you find a collapsed drain?

We use a CCTV drain camera to confirm the collapse and pinpoint its exact location and depth, so any excavation is targeted precisely.

How much does it cost to repair a collapsed drain?

It depends on the location, depth and repair method. A camera inspection lets us give an accurate upfront fixed price.

Why does my drain keep blocking?

Recurring blockages that clearing will not fix often mean a collapsed, cracked or sagging pipe trapping waste. We find the cause with a camera and repair it.

Is a collapsed drain urgent?

It should be addressed promptly, as it causes recurring blockages, backups and can worsen, and a collapsed sewer is a health concern.

Do you service my area?

Yes, we repair collapsed drains across Brisbane, Perth and Adelaide, with same-day assessment where we can.

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Debbie Robertson

Jack was very informative and provided exceptional advice. Repairs were carried out professionally and smoothly. Bathroom and surrounds were left neat and tidy

Norm Hayward

Andy was prompt and the job waz amazing. Highly recommend this guy

Trisna Dewi

They do really good job, fast, I am so happy with your job fixing my toilet, thank you. 🙏

Terri Baldock

Diego C was very good and explained everything even giving me several options for a new power point. Happy with the job 😊

Nicole

Fast response, very polite and communicated well. Happy to recommend.

Luciano Leombruno

Had Cameron from same day trades around today, gave me a few options and made me aware of a few electrical issues in the house. Professional and would recommend to anyone.

D W

Connor was efficient, polite and helpful

Cat girl SA

The electrician Diego arrived on time and quickly got to work. He explained what needed to be done to fix the power point and gave some options. He had me test the fix when he was done so I was assured the job was safe and completed. Recommended