Thousands of households were left without water for part of Tuesday morning after there was a problem with a valve.
Around 3000 homes in parts of Dundee and Perthshire were affected after the fault caused disruptions in the mains water supply.
Scottish Water said it was on the scene as quickly as possible to carry out repairs and said most of the homes are back with running water.
The DD2 and PH14 postcode areas were affected and the issue was reported at around 5.30am Tuesday.
A spokesman for the company apologised to customers for any inconvenience caused.
She added: "We have carried out a repair this morning to a faulty valve on our network which had been potentially affecting water supplies to more than 2,000 properties in the DD2 and PH14 areas.
"Water has been flowing back into the network since 8am and most, if not all, customers should be back in water. "
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