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We clean sewer mains regularly to maintain and deliver quality services to our customers. This may cause some disruption to service and traffic.

See our planned works and interruptions page for the latest information on planned works in our region.

Why mains need cleaning

The ongoing maintenance of our water and sewer network:

  • helps prevent blockages
  • improves the efficiency and reliability of our service
  • helps prevent issues such as sewer overflows or leaks.

How we clean sewer mains

We assess sewer mains using CCTV technology so we can use the cleaning technique that's best suited to its condition.


A high-pressure hose with a cleaning nozzle is pushed through the main. The most common form of cleaning, jetting takes place in a section of sewer main between two manholes and is often used before inspecting or renewing mains.

Stop the Block campaign

We are reporting record low sewer blockages thanks to a dedicated program of sewer maintenance and preventative cleaning known as “Stop the Block”.

We launched the Stop the Block campaign in 2016, increasing investment to over $1 million each year to improve sewer performance and reduce service interruptions, overflows, and impact to communities and the environment. 

In the 2020-21 financial year, we recorded 18 blockages per 100 kilometres of sewer, which is a dramatic reduction since the 2013/14 financial year, where we recorded in excess of 60 blockages per 100 kilometres.

It’s also a reduction from 22 blockages per 100km in 2019/20 financial year.

The 70 percent reduction means greater than 3,800 blockages have been avoided in the last 7 years. This is a huge reduction in customer and environmental impact. It’s also saving customers’ money on reactive sewer repairs and clean-up costs. 


Will I be impacted?

We'll let you know once we've cleaned in your area. You won't be impacted by the cleaning program and your water supply will not be interrupted.

From time to time customers experience a blown seal or other problem arising from the works, in this case you should call us as soon as possible on 1300 363 200.

Last updated on 28 Jul 2023
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