Homes across a swathe of west London were left without running water for hours on Sunday morning.
Angry residents vented their frustration after homes in 11 postcodes, including most of Ealing, were left with low water pressure or no water at all.
A man, who lives in The Grove near Ealing Broadway, said he had been without running water since before 8am.
He told the Standard: "I've been working nights eight days on the trot and all I wanted when I got home was a bath.
"Bills are sky-high round here so with this and the constant roadworks it's really not on. This might sound a bit much but it's ruined my bank holiday.
“I’ve had no water since at least 8am.”
Thames Water apologised and said the problem was fixed shortly after 12.30pm with water pressure expected to return to normal as soon as possible.
The company's Twitter account was bombarded by complaints from residents who were left without running water.
One wrote: “No water pressure in Sydney Road, West Ealing either. Send a bucket of warm water so I can rinse the shampoo out please!”
Another said: “Hello, we live in West Ealing and currently have no water at all... is this being investigated? Thanks.”
A Thames Water spokesman said: “We’re sorry to those people who have had no water or lower pressure than normal.
“There was a problem with one of the two pumps that supply the area, resulting in the low pressure, but engineers have now resolved the issue and the water supply has returned to normal.”