Wellington mayor Tory Whanau wants Government help to fund the city's water do-over.

The Council is doing a finances workshop this week.

Wellington Water is asking it for $2.5 billion over 10 years to fix its leaky pipes - which spill about 40 percent of the city's treated water.

Whanau says they're proposing meters to see where water's going - and they'll also need to spend more.

"Not in the billions, because we're not in the financial position to do that. We require some collaboration with the Government and our stakeholders to be able to look in the longer term."

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