Luas cross-city works will cause water loss and reduced pressures in some areas of Dublin city on Sunday.
Dublin City Council said a major water connection was being made for the new Luas city line.
It said there would be reduced pressure and possible temporary loss of water supply until midnight on Sunday.
The areas likely to be affected are: Cabra, Phibsborough, Glasnevin, Drumcondra, Whitehall, Marino, Santry, Beaumont, Donnycarney and Artane.
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If people need to contact the council the day telephone number is (01) 864 3634 and after 5pm call (01) 6796186.