In NSW, property owners are generally responsible for their private wastewater pipes up to the point where they connect to the public sewer network, while Sydney Water maintains the public sewer assets it owns, including wastewater pipes, maintenance holes and other infrastructure within its network. A CCTV drain inspection costing $350 can help locate the blockage and identify which part of the system needs attention; the inspection is free when you proceed with a drain clearing or relining job.
Understanding Your Drainage Boundaries
When a sewer drain blocks, the first question is often who must arrange and pay for the repair. The answer depends on where the blockage is located and who owns the affected pipe.
In a typical Sydney property, wastewater travels from toilets, sinks, showers and other fixtures through private drainage pipes before reaching the public sewer network. The property owner is generally responsible for maintaining the private system. Sydney Water is responsible for the public wastewater pipes, sewer mains, maintenance holes and infrastructure it owns.
Though the property boundary is a useful reference, it is not always the exact point where responsibility changes. The private connection can extend beyond the boundary, and the connection point may sit under a footpath, roadway or another property. The actual asset ownership and connection arrangement need to be confirmed.
Private responsibility can also include shared pipes. For example, a pipe serving several units within a strata building may be privately owned even though multiple occupants use it. Similarly, a private pipe serving one property may cross a neighbouring property. In these cases, responsibility for maintenance and the allocation of repair costs can depend on the ownership arrangement, title, easements and applicable agreements.
For Inner West residents, Sewer Surgeon locates the fault and identifies the affected section before recommending work. With 63 years of experience working on the sewer systems of Sydney, we can trace blockages through CCTV inspection and identify the boundary line of your property. We can also help you understand whether the blockage sits in the private sewer line or Sydney Water’s property.
Identifying the Blockage Location
- If one toilet or sink is blocked while other fixtures drain normally, the issue may be confined to a local section of private plumbing.
- If several fixtures back up at once, the blockage may be further along the private sewer line or in a shared drainage section.
- Neighbours experiencing similar blockage problems, an overflow from a public maintenance hole or a continuous overflow when nobody is using water can indicate a possible issue with the public network.
- If the line keeps blocking after repeated clearing, the fault may be downstream and needs inspecting.
A professional CCTV drain inspection allows a plumber to inspect the inside of accessible pipework and locate visible obstructions, tree root intrusion, cracked sections and displaced joints. The inspection can help establish the blockage's position relative to known access points and the connection to the public sewer. You can compare the findings with the available sewer service diagrams and network information.
Sewer Surgeon provides CCTV inspections, with the inspection fee waived when you proceed with blocked drain clearing or pipe relining. This helps establish the likely cause and location before repair options are discussed.
When the Problem Is Sydney Water's or Council's
Sydney Water's responsibility generally includes its wastewater pipes, sewer mains, maintenance holes and other infrastructure within its network. If the camera inspection indicates the blockage is in a Sydney Water-owned wastewater pipe, contact Sydney Water rather than arranging private repairs to its network without authorisation.
Sydney Water provides a 24/7 wastewater fault service on 13 20 90. Its guidance identifies several signs that a blockage may be in its pipes, including wastewater overflowing from a public maintenance hole, multiple affected properties or widespread local flooding.
If a plumber has already investigated and found a blockage in Sydney Water's pipes, ask them to report it to Sydney Water and obtain a job number. Before any excavation, the plumber must call Sydney Water. Its crew can inspect and jet the authority’s wastewater main. Sydney Water issues a job number, and if the fault is found in its pipes, the plumber can claim eligible investigation costs back under the scheme. If the main is clear, the blockage is in the private drainage system and the property owner is generally responsible for the repair costs. Do not approve excavation before Sydney Water has inspected the main.
However, stormwater is a separate system. Roof water, rainwater runoff and surface drainage do not automatically fall under Sydney Water's sewer responsibilities. The property owner generally owns a private stormwater pipe, while the relevant council or another asset owner may maintain public stormwater infrastructure. Contact the relevant council when the problem appears to involve a council-owned street drain or public stormwater asset.
Sewer Surgeon can provide CCTV findings and supporting documentation to help property owners explain the issue when contacting the relevant authority. If the defect is in your private sewer line, we can recommend the appropriate repair. Where internal pipe relining is suitable, Sewer Surgeon provides a lifetime workmanship guarantee on the work.
Frequently Asked Questions
What is the difference between a drain and a sewer?
A drain usually refers to a pipe carrying wastewater away from fixtures or a property. A sewer generally refers to the larger network that collects wastewater from properties and transports it for treatment.
Who is responsible for a blocked drain if I live in a rented property?
Responsibility depends on the specific pipe and its connection to the network for the tenant or landlord. The landlord is generally responsible for arranging repairs when a blocked drain results from damaged pipes, tree roots or normal wear and tear. If the blockage was caused by the tenant’s misuse, such as flushing wipes or disposing of grease down the drain, you may be responsible for the repair costs.
How do I prove whether the blockage is my responsibility?
Start with a sewer service diagram and a CCTV inspection report. The diagram helps show the private pipe layout, while the inspection can identify the location and condition of the blockage. If the suspected fault is in the public network, ask Sydney Water to investigate and confirm asset responsibility.
Does home insurance cover a blocked sewer drain?
It depends on your policy, the cause of the blockage and the resulting damage. Some policies may cover certain types of damage caused by a sudden escape of wastewater, while routine maintenance, gradual deterioration or the cost of clearing a blockage may be excluded. Check your policy wording and contact your insurer before assuming the work is covered.
What should I do if tree roots have damaged my sewer pipe?
Arrange an inspection to establish where the roots have entered and whether the pipe is cracked, displaced or structurally damaged. Root removal may restore flow, but recurring intrusion can indicate that the pipe itself needs repair. Depending on its condition, options may include targeted clearing, internal pipe relining or excavation and replacement.
Need Help Identifying a Blocked Sewer?
Sewer Surgeon assists homeowners, strata managers and property investors across Sydney and the Inner West with CCTV inspections, drain clearing and private sewer repairs. We use the inspection findings to explain where the fault appears to be, what work may be required and who is responsible: Sydney Water, the council or you.
Book a CCTV drain inspection at $350, free when you proceed with clearing or relining, to help establish what is happening inside your drain before deciding on the next step.
