DUNBAR, W.Va. -- West Virginia American Water says flushing out main water lines in the city of Dunbar next week might temporarily discolor water and lead to low pressure for city residents.Water company spokeswoman Laura Jordan said the water company periodically flushes out water lines by opening fire hydrants full blast. Flushing the lines could create temporary drops in water pressure and flush sediment into home water pipes.Water discoloration should last only an hour or two, Jordan said. She suggested customers experiencing dirty water should avoid washing laundry or using their dishwashers until the water clears. If dirty water or low persists, check faucets to make sure loose particles aren't trapped.Water flushing is scheduled to begin Monday on Washington Street West and progress westward through Dunbar to Institute. Flushing is expected to be completed by Sept. 27.