Why Tree Roots and Old Earthenware Define Paddington’s Blocked Drains
Paddington is a terrace neighbourhood, its drainage is very different to the apartment suburbs nearby. This sewer system was constructed in the early 1900s when the population of the suburb reached approximately 26,000 in 4,800 houses. The drains installed at that time, and many remain in use today, are earthenware and salt glazed clay pipe, with hard mortar couplers. This pipe is more than 100 years old.
Over more than a century, these clay joints crack and move. The ground shifts, the rigid mortar can’t move with it, and the gap between the pipes increases. The other characteristic feature of Paddington is, of course, that it is a very green suburb, with the narrowest streets and the oldest trees. Tree roots are never lazy about finding water, and if there is a leak in a sewer joint that is letting water and nutrients in, then that’s exactly what they want. They discover the opening, enter and develop into dense fibrous masses that trap all the material that moves through the pipe and impede flow.
That’s why in Paddington, the most frequently occurring blockage type that we attend is root intrusion into old earthenware drains. It’s not an accident. It’s not due to residents’ bad habits. It’s just the inevitable outcome of a clay pipe nestled in the root zone of a well-treed neighbourhood. And, since roots regenerate, removal is only temporary unless the entry point is treated.
On top of that, Paddington’s terraces are built on the side of the Oxford Street ridge, on narrow lots which are clustered tightly together. The slope has an impact on drainage grade, narrow lots have restricted access, and boundary drainage for terraces is shared with neighbours. We operate across both Paddington and the Eastern Suburbs every day and know what happens beneath these streets.
Paddington Drainage: The Numbers
When Paddington’s sewer system was built. The original earthenware drains are more than a hundred years old and have broken joints which have been invaded by roots.
The majority of houses in Paddington are terraced or semis (both buildings share a narrow lot, a boundary drain, and access for drainage purposes is very restricted).
In Sydney, 75% of wastewater blockages occur because of non-flushable wet wipes, which get stuck on old pipe, rough areas and root masses.
The time trees will re-establish from a cleared pipe if the joint they broke into is not repaired, documented by Sydney Water.
Sources: ABS Census (dwelling structure), Paddington; historical sewer records; Sydney Water blockages and root regrowth data.
What Actually Blocks Drains in Paddington
Century-old earthenware drainage, a leafy treed setting, narrow terrace lots on a slope, here’s what we find most.
Tree Roots in Earthenware Joints
The Paddington signature. Old clay sewer pipes, with cracks in their walls, draw roots from older street and garden trees, which look for water and nutrients inside. They grow into dense masses that snag debris and block flow. They are cleared by jetting and root cutting, but unless the cracked joint is sealed, the roots return, Sydney Water has documented regrowth within about eleven months. That is why we recommend relining the affected section for a long-lasting fix.
Cracked & Collapsed Clay Pipe
The earthenware drains in Paddington are more than a century old. The rigid mortar joints can’t flex, and after years of shifting on the slope, the joints and the pipe crack, opening gaps. A crack will catch debris and slow down the flow, a collapse will stop it altogether. We camera-inspect to find exactly where the pipe has failed and how badly, before suggesting replacing or relining the pipe.
Loss of Grade on the Slope
The terraces of Paddington face down the ridge of Oxford Street towards the harbour, and it is more difficult to control the drainage on a sloping surface. In approximately 100 years, sections of pipe shift and lose their fall, forming sags and flat spots where waste collects instead of flowing away. If the sewer line has a grade problem, it will repeat in the same spot over and over again. A sag shows up clearly on a camera inspection.
Wet Wipes and Everyday Buildup
According to Sydney Water, non-flushable wet wipes are responsible for 75% of all the wastewater blockages. Wipes snag and accumulate far more readily in the old rough earthenware pipes of Paddington than in smooth modern pipe and around any root mass. When the fats, oils and grease from the kitchen are added to them, they form the blockages we remove every week.
Shared Boundary Drains
Paddington terraces are often built close to the boundary, so the drainage runs tight against them and may cross the boundary. If there is a blockage in a common or boundary drain, both terraces may be affected and the question of ownership arises. We camera-inspect to establish exactly where the blockage is, document it, and sort the cost out fairly with neighbours where a shared line is involved.
Damp or Subsidence in the Garden
A garden or paving surface that stays damp or slightly sunken may indicate a broken or damaged pipe that is leaking underground. A camera inspection now can prevent a major collapse or blockage later.
How We Clear and Repair Drains in Paddington
CCTV Drain Camera Inspection
DiagnosticThe camera is essential for Paddington’s earthenware drains, where roots tend to grow. It will reveal the exact location of roots, the damaged section of the clay pipe, and the extent of damage. We record it and show you. Importantly, it enables us to tell whether it’s a one-off blockage or a structural issue that requires relining, and therefore to not be wasting money trying to clear the same root blockage each spring.
High-Pressure Jet Blasting
ClearingA concentrated water jet is able to penetrate root masses, wet wipes, grease and debris, clearing the entire bore of the pipe. A jetting head fitted with a root cutter will remove the obstruction much more effectively than a drain snake which simply makes a hole in it. We verify the results with a second camera pass, and let you know honestly if the roots are going to be coming back without a relining.
Pipe Relining (No-Dig Repair)
Permanent FixThe true solution to Paddington’s underlying issue. With relining, the new pipe is installed inside the old earthenware pipe, sealing the broken joints that roots have entered through, making them inaccessible. If the house is a heritage terrace with a paved courtyard, an established garden or restricted access, then relining avoids digging through it all. The new smooth interior also won’t accumulate silt over time. Relined pipes are guaranteed for 35 years or longer.
Excavation and Replacement
When NecessaryIf the clay pipe has completely failed and cannot be relined, it is necessary to excavate the affected section and replace the pipe. It’s careful work in narrow terrace plots with limited access, often among heritage gardens, so we plan the access and protect the heritage fabric and landscaping. We only recommend excavation when it is not feasible to reline.
Why Your Paddington Drain Keeps Blocking With Roots
The most common question we receive from Paddington residents is, “Why is the drain blocked again? We had it cleared last year.” Almost always the answer is roots, and it’s about what root blockages actually do.
Roots that invade a crack in a clay joint grow into a mass inside the pipe. Removing the blockage, even through a root-cutting jet, will remove the mass, but not the crack through which the roots grew. The root system outside the pipe is still alive and still looking for moisture inside the pipe! Sydney Water has documented roots re-sprouting inside a cleared pipe in less than a year. So, a cleared root blockage is not solved, it’s on a clock.
The best way to prevent root growth is to close the opening. After the section of pipe is relined, it forms a smooth, seamless barrier within the old pipe, which means no crack for roots to work their way through. It’s for this reason that we show you the video of the roots in your drain and talk through the relining option. To get you going again, clearing is the answer; to fix it for good, relining is the solution. We don’t book you for another clear next spring, we allow you to make an informed choice.
Shared Boundary Drains: Who’s Responsible
The terraces of Paddington are constructed close together, and drainage is often common to two or more terraces. This is a question which doesn’t occur in an isolated house: if a shared or boundary drain becomes blocked, who pays?
Typically, you are responsible for the maintenance of the terrace drainage up to the point that it joins Sydney Water’s main in the street. However, where one drain line is actually shared between two terraces (as is the case in some older drainage systems in Paddington), the responsibility for this can be shared between the property owners and the details will vary based on the configuration and the orientation of the drain line.
That’s why a CCTV camera is important! We record exactly where the blockage is and what the drainage system looks like, and if it is a shared system, the cost can be discussed with the neighbour based on evidence and not assumptions. If there’s a definite backup in your line, it’s easier: we fix it up and you’re done!
How a Drain Call-Out Works in Paddington
Let us know what is occurring (slow drains, gurgling, recurring blockage or smell in the garden). We send a plumber to your terrace.
We use a CCTV camera and run it through the line to locate the cause of the problem, whether that is roots, a cracked clay joint, a sag, or simply a clog, and determine precisely where the problem is.
Full flow is restored by jet blasting using a root-cutting head. You get a clear price before work begins, confirmed by a second camera pass.
We show you video of the roots or the broken pipe and let you know whether relining will stop it coming back, so you can make an informed decision.
What Our Customers Say
“Every year our drain would get blocked with roots and Premium Sydney Plumbers would come and show us the broken joint and then put in a liner, and we’ve had no problems since (2 years later).”
“Called with a query about plumbing and they replied within two days, very reasonable, highly recommend this service.”
“Callout was quick and great service, and explained what was happening under the garden with the camera footage. Highly recommend, thank you again!”
Blocked Drains Paddington: Frequently Asked Questions
Other Paddington Plumbing Services
We also handle these common Paddington jobs.
Emergency Plumber:
Burst pipes, gas leaks, flooding and urgent terrace repairs throughout Paddington, 24/7.
Blocked Drains:
Repairs and replacements for terraces, with heritage and courtyard constraints handled.
Areas We Service Near Paddington
We clear blocked drains across Paddington and all surrounding Eastern Suburbs locations.
Blocked Drain in Paddington?
Clearing won’t help if it keeps blocking with roots. Pick up the phone and we’ll use a camera to find the actual cause, then we’ll sort it out for you, we’re here to help you make an informed decision, clear or reline.
