Replacing water mains

Replacing water mains

Part of our responsibility isn’t just delivering good quality drinking water; it also includes maintaining the system that delivers it.

Through smart investment, upgrading our water mains helps to improve and maintain the network’s reliability. As a result, this means we can meet the demand for safe, clean drinking water now and into the future for South Australian households. It also helps ensure businesses, schools and hospitals can access the water they need to prosper and serve the community.

South Australia has significant challenges in terms of the soil, topography and weather, and that’s what drives a lot of our water main replacements. It’s a part of the life of a growing city and state.

We do not prioritise water mains for renewal based on a pipe's age. Traditionally, water mains have a useful life of approximately 100 years. Some may last longer, and others may need to be replaced sooner depending on a number of conditions. Around eight per cent of our water mains are more than 100 years old, but around half are less than 50 years old.

How we upgrade water mains

To maintain the state’s complex water systems, our annual water mains replacement program prioritises those mains that are most likely to require attention.

We prioritise the replacement of our water mains based on a number of factors including:

  • the likelihood of future water main breaks (previous failure history)
  • the consequence of water main breaks (customer interruption)
  • if the water main is causing a restriction (low supply flow)
  • economic efficiency.

We seek to balance the level of service provided against the expense of replacing the mains. We understand both of these factors can impact upon our customers.

How we involve you

We understand the impact any SA Water work may have on the community. Before planned main replacements, we provide advance notice to local councils, residents and businesses. This helps to increase awareness in the community of upcoming work in their area. Alternative arrangements to potential water outages and traffic interruptions can be made to minimise any potential inconveniences.

We encourage councils to provide us with their programs of work. This enables us to identify and, where possible, coordinate projects in similar areas to minimise disruption to traffic and the community. We also work closely with the state Department of Planning, Transport and Infrastructure. This helps limit impacts to the community when work is undertaken by both organisations in the same location.

  • Major faults

  • Underway

  • Polkinghorns Rd
  • Arthurton
  • 18/06/2020
  • Water Supply On
  • 18/06/2020 03:05 PM - We are attending to an incident in Arthurton with no interruption to the water supply. The safety of our crews and customers comes first, and we always aim to minimise inconvenience by restoring services as quickly as we can. Reference Number WO: 07505663.
  • See all major faults

  • Scheduled works

  • Underway
  • Pilatus Dr
  • Direk
  • 05/08/2020
  • Temporary Supply Interruption
  • Estimated start time and water supply off: 07/08/2020 07:30 AM
    Estimated restore time and water supply back on: 07/08/2020 10:00 AM

    We’re improving your services and undertaking maintenance work in Direk. Sometimes our crews need to temporarily interrupt the water supply to our customers and/or manage traffic while they are working. Temporary traffic management may remain in place until reinstatement of the impacted road is complete. We always aim to minimise inconvenience by restoring services as safely and quickly as we can.


  • See all scheduled works