Water and Sewer Main Renewals Program

We are constantly monitoring the condition of our water and sewerage networks so we know when it’s time to renew a pipeline or other piece of infrastructure to make sure it’s working for you.

We identify what needs to be renewed by carrying out extensive analysis, which considers the age, material, performance and maintenance history of each pipe. We also use some of the latest technology to help identify the condition of our pipelines before they fail and interrupt your service.

For more information, please see the following questions and answers.


Water main renewals questions and answers


  • The renewals program identifies pipes and assets that need upgrading or renewing to improve quality and ensure reliability of service. The works are necessary to ensure we can provide our customers – you – with a trusted, reliable and efficient service.

  • If works are planned for your street, you should receive a letter from us about five working days before works begin. The letter will provide details about the works, such as the expected timeframe, working hours, local impacts like traffic and parking, and any impact on your water supply.

  • The new water main will be laid in the nature strip or footpath, or if necessary, in the road. Where possible, trenchless construction techniques will be used to lay the new water main without having to dig a trench. If that’s not possible, works will involve digging a trench, laying the new water main, and then filling in the trench and reinstating the nature strip or road.

  • We have a number of contractors who carry out works on our behalf. If works are planned or under construction in your area, the contractor for each job should be listed in the right-hand column of the relevant table on this page.

  • If there are going to be works on your street, we will most likely set up temporary water supplies for you and your neighbours.

    A temporary supply means that you will continue to have water while the works are underway, except during a short period while the temporary service is set up and disconnected, and while the newly installed water main is connected into the network once works are complete.

    In the case of any planned disruptions to your water supply:

    • you should receive written notification at least 48 hours before
    • disruptions will generally be less than three hours
    • you will be able to obtain water from a tap on a nearby fire hydrant. Please call our 24-hour Operational Control Centre on 132 642 to find out where this is.

    If you have any water supply requirements other than normal domestic or business use, such as health-related needs, please call us on 132 642 to let us know.

    Please note, this information is about planned water main renewals only. It does not apply to water supply disruptions that occur because of faults or emergencies, such as a burst water main. To report a fault or emergency, please contact our 24-hour Operational Control Centre on 132 642.

  • Yes, you can drink and use temporary water supply as you would normally use water from your taps. Temporary water supply is the same water supply that you normally receive, but via a temporary pipe into your property. We set this temporary pipe up – usually a flat blue hose from the nature strip or road across your driveway – so that we can continue supplying you water from our network while the water main in your street is being upgraded or renewed.

    Please note that if a temporary water supply is set up for your property, water from your cold tap will be warmer than normal and will significantly increase on the hotter days so please be careful when running a bath or shower. If water from your cold tap remains hotter than normal after the tap has been running for a few minutes, call the contractor undertaking the works. Their contact details should be in the letter you received to notify you about the works.

  • During a planned water main renewal, most driveways will have a temporary water supply pipe – usually a flat blue hose – laid across them so that we can continue to supply your property with water while we’re working. We may also need to place a heavy duty recycled rubber ramp across your driveway to protect this hose. Please ensure vehicles travel slowly over the ramp without stopping or starting.

    In addition to this, construction may affect your driveway. In most cases, the construction crew will be able to drill underneath driveways so that customers can access their properties at all times but if this is not possible, works will affect your driveway temporarily. If this is the case, you will be notified in advance and your driveway will be reinstated once works are complete.

  • If a temporary water supply is set up for your property during the works, you will have water for normal household use but not for fire fighting purposes. If this is the case, you may want to contact your insurance company to advise them of this.

  • Yes, we will reinstate any road, asphalt, footpath, soil or grass that we damage during works. You may notice some damaged surfaces will be temporarily sealed with asphalt, which will be in place until the final reinstatement works are completed. Reinstatement works are often carried out two to four weeks after water main renewal works are finished. You should receive notification about reinstatement works from our contractor, Downer EDI Limited.

  • No, this program is part of our annual budget and does not include any extra cost to you directly or through your water bill.

  • Email us on projectdelivery@citywestwater.com.au or for urgent enquiries, call us on 132 642.


Sewer main renewals questions and answers


  • The renewals program identifies sewer mains that need replacing or repairing. The works are necessary to:

    • improve service reliability for customers
    • reduce maintenance and repair costs in the longer term
    • reduce the risk of potential sewage spills to the environment.
  • If works are planned for your street, you should receive a letter from us about five working days before works begin. The letter will provide details about the works, such as the expected timeframe, working hours, local impacts like traffic and parking, and any impact on your sewer service.

    Sewer main renewals do not normally involve the same level of disruption in terms of noise, services and neighbourhood amenity as water main renewal works can. The works are normally done by accessing the sewer main through existing manholes and are usually done quickly over half a day to a day. Sometimes works do need to involve excavation, which is more disruptive, but this is not usually the case.

    Sometimes works involve accessing a sewer main on private property. If this is the case for your property, we will contact you and might ask you to:

    • provide access to your property
    • avoid using your toilet, sink, shower, washing machine and other household appliances that discharge wastewater into the sewer for a short period of time while we work
    • move your car from the street temporarily.
  • We have a number of contractors who carry out works on our behalf. Our contractors should be wearing clothing that identifies the company they work for, and will probably also have some signage identifying the work as a City West Water project. If you have any questions about contractors, please email us on projectdelivery@citywestwater.com.au or for urgent enquiries, call us on 132 642.

  • Sewer main renewal works usually involve inspecting, cleaning and relining the sewer pipe. These works are undertaken from the surface via pits in the street, which limits the impacts of the works.

    In some instances, the condition of the sewer may require excavation works. If excavation works are required you will be notified beforehand, if they will directly impact you. Most excavation works are completed within a couple of days.

    Sometimes, we need to do night works to complete sewer main renewal works. In most cases, these works will only take one night. They are usually in the road or nature strip and should not affect private properties.

  • If the works involve a sewer main that is on your property, we may contact you and ask you to avoid using your toilet, sink, shower, washing machine and other household appliances that discharge wastewater into the sewer for a short period of time while we work. If this is the case, it is likely to only be for half a day or so, and you will be able to go back to normal once the works are completed.

  • If the works will affect access to street parking or your driveway, you should be notified by our contractor beforehand and they will discuss alternative options with you. However, most of the time these works do not affect parking or driveway access.

  • Yes, we will reinstate any road, asphalt, footpath, soil or grass that we damage during works. You may notice some damaged surfaces will be temporarily sealed with asphalt, which will be in place until the final reinstatement works are completed. Reinstatement works are often carried out two to four weeks after sewer main renewal works are finished. You should receive notification about reinstatement works from our contractor, Downer EDI Limited.

  • No, this program is part of our annual budget and does not include any extra cost to you directly or through your water bill.

  • Email us on projectdelivery@citywestwater.com.au or for urgent enquiries, call us on 132 642.