One of the largest water and sewage network rehabilitation projects undertaken in Aleppo Governorate includes maintenance and replacement work on water networks ranging in diameter from 20 mm to 1400 mm, using various types of pipes. This includes excavation, backfilling, asphalt paving, and concrete work, along with the provision of necessary materials: Drinking water: PE, ductile iron, black iron, galvanized iron Sewage: PE, cement pipes, PVC