Hundreds of homes across Preston hit by poor water pressure should now have normal service, United Utilities has said.
A burst water main had been found in Walton-Le-Dale and repair work had been ongoing since Sunday morning.
Residents have been warned their water may appear a little cloudy for the next couple of hours.
A latest update, posted on Monday morning, reads: "Our team of engineers have finished repairing the leaking pipe and the water should be starting to flow normally again.
"We are keeping a close eye on things to make sure your water supply fully restores. It may take up to 2 hours for the water pressure to return to normal levels. We’re really sorry if this has affected you and thank you for your patience whilst we got this sorted.
"Because there’s been some disturbance to the pipes in your area you may notice the water is a little cloudy or discoloured, please check our Discoloured Water page for more information."
The problems were first reported around 7am on Sunday, October 15 and are affecting properties in the PR1, PR5 and PR26 postcode areas.
A leak was discovered close to the junction of Hennel Lane and London Way.
An earlier update said: "Due to the complex nature of the repair to the burst water main, work will be on-going.
"Our team of engineers will remain onsite working hard to repair the leak as quickly as possible and in the meantime our water tankers will continue to pump water into the pipes to keep your water supply flowing.
"We’re sorry for the trouble this may be causing you and we will get your taps flowing normally again as quickly as we can."