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Last reviewed: 16.4.2013 - 1.42pm
We have replaced more than 1,600 miles of old water mains, to reduce leaks and bursts and improve supplies for a growing population.
Please click the links below to find out more.
Why we are replacing pipes
Possible impacts of our work
How we replace pipes
Easing congestion in the capital
Frequently asked questions
Get the latest information on major repairs, reported leaks and planned work across our network.
We're investing nearly £5bn between 2010 and 2015. Explore our interactive map to find out how your region will benefit.