Water supplies around a street in Lowestoft "may be affected" as emergency repairs are carried out.
Essex and Suffolk Water has issued the warning to householders living on Celandine Close in Carlton Colville.
With a suspected leak raised with Essex and Suffolk Water last week, workmen attended the area to "investigate the issue."
Workmen have now returned to Celandine Close to excavate and repair a suspected leak on our pipeline between the water main and a stop tap chamber."
A spokesman for Essex and Suffolk Water said: "Emergency repair required - water supplies around Celandine Close may be affected for a short while.
"Thank you for your patience."
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