Hūnua 4 watermain project

This 31km pipeline through Manukau and Auckland will meet growing demand.

Start-finish: 2012-2021 (section 11: November 2018 - mid 2022)
Location: From Manukau to Khyber Pass, undertaken in 11 sections. Section 11: Market Road to Khyber Pass.
Status: Sections one to 10 have been constructed and are now in use. Section 11 is currently in construction. 

What’s happening?

Starting in 2012, we have been installing a new water pipeline called Hunua 4 that runs from Redoubt Road in Manukau City and will finish at Khyber Pass in the central city, at a cost of $400 million.

The pipe is now in service up to Market Road, Epsom. Works to complete the final section which runs from Market Road to the Khyber Pass reservoirs started in November 2018 and will be completed in 2021. The completion of the new watermain will ensure that we can continue to provide uninterrupted, high-quality water.
Hunua 4 watermain map
Tunnelling progress
To minimise disruption, construction is mainly done through tunnelling. Some sections will require open trenching and there will be five shafts to allow access for the tunnelling machine.

Take a virtual tour of the section 11 sites
See the photo gallery

What are the benefits?

Although the project is temporarily disruptive, it is vital to the future development of our city. The watermain will:

  • ensure that, as demand for water grows, we can continue to provide an uninterrupted, high-quality water supply
  • provide resilience in the event of a natural disaster
  • allow us to maintain our assets without major disruption to the water supply.

We thank all those affected for their understanding during these important works.  

Any questions?

Please contact us:
Email: [email protected] 

View a time lapse of work in Victoria Street, Onehunga:

More information

Hūnua 4 flyer - August 2020 update