London trunk mains projects

We're investing in our region by replacing trunk mains in London.

Our trunk mains have the important role of moving large volumes of drinkable water. They move water from treatment works across the network to various service reservoirs. That’s how we get clean drinking water to your taps.

Much of the trunk main network was built in the early 19th century using simple techniques. There often wasn't consistent quality control when creating the water mains.

So, we're investing to upgrade those mains which will help to: 

• Provide a more reliable drinking water supply
• Reduce leaks and burst pipes
• Ready pipes for a growing population
• Increase the amount of water carried