WSA TN 12 Self cleansing flows and Sewer Pipe Sizing Calculator - WSA 02:2014 Gravity Sewerage Code of Australia Version 3.3

This Information and Guidance Note provides a brief explanatory note for the basis for the Sewer Pipe sizing calculator in WSA 02:2014 Version 3.3. 

The Sewer Pipe Sizing Calculator now gives users the option of a fixed roughness coefficient or a variable roughness coefficient in the determination of the self-cleansing flow.