Unidirectional Flushing Program

In 2017, Courtenay Public Works Services launched a Uni-directional Flushing (UDF) program for the City's water mains.

Unidirectional Water Main Flushing Statistics

  • 2020: 21 kilometers in West Courtenay
  • 2019: 24 kilometers in East Courtenay
  • 2018: 26 kilometres in East Courtenay
  • 2017: 16 kilometres in East Courtenay

There are a few differences between conventional flushing methods and UDF. The UDF technique involves the strategic use of valves and hydrants to isolate sections of water mains. Through this method, crews are able to achieve higher water velocity, which in turn increases effectiveness and reduces water use by 40% compared to conventional flushing methods. 

UDF enhances overall water quality within the water distribution system, and improves system operations by reducing turbidity, removing sediment, silt and biofilms, lowering chlorine demand, increasing system hydraulic capacity, and increasing the life of system components.

Learn more about Courtenay's Water Supply