The efficiency of surge flushing is influenced by the following factors:

• Back up height and flushing water volume
• Shape and dimensions of the cross section
• Alignment of the sewer section
• Gradient of the sewer section to be flushed
• Type and extent of the formed deposits
• Condition of the pipe walls
• Number and interval of the surge waves
• Quantity of water in the flushing section (dry weather and wet weather flow, u-bends, discharges, wave superpositions, etc.) [SteinD00] [Gürsc1921] [Haußm1998]