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Dunedin City Council – Kaunihera-a-rohe o Otepoti

Dunedin’s hilly landscape means water pressure varies quite considerably across the city. We aim to provide water at pressure between 300 and 900kpa. Pressure below this level can be frustrating for customers but high pressure, while giving a great shower, can put additional stress on pipework and increase leakage.

Pressures above 1250 kpa may cause problems for your pipes and it is generally advisable to have a pressure reducing valve fitted on your own supply line if your water pressure is in this range.

The DCC is working hard to reduce mains water pressure to below this threshold.  Following recent work to install additional pressure reducing valves on the water mains themselves, there are now only 130 properties that have pressures above this level. Further investment over the coming months should reduce this number to just 11 by the end of the financial year.

Approximately 16% of customers have water with pressure between 900kpa and 1250 kpa.  While we are steadily working to reduce pressure in these areas, it will take several years and cost about $3m to complete all of the necessary work.

If you have water pressure in this range, you should ensure that your plumbing system is appropriate for higher water pressure.  If your pipes are rated to 1250kpa, modern and installed in compliance with the building code you should not have any problems, although many modern appliances such as dishwashers are not designed for this kind of water pressure and need to be protected with a pressure reducing valve.

If you have an older property or are unsure about your plumbing you may wish to consider installing a pressure reducing valve at your point of supply to minimise your risks of water leaks. Remember that if you are a metered customer, you are responsible for the cost of water that passes your meter even if it is lost through leakage.

If you have any concerns about your water service or your water account, please contact us on 477 4000.

You can get an idea of your water pressure by checking the DCC’s Webmap - Water Pressure.

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