Waste Water Engineering
¾th or ¼th extra space is left in sewer pipes at maximum discharge for

Large scale infiltration of storm water
Unexpected increase in population
Low estimates of the average and maximum flows
All listed here

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Waste Water Engineering
The sewer pipes

Carry sewage as gravity conduits
Should resist the wear and tear caused due to abrasion
All listed here
Are designed for generating self-cleansing velocities at different discharge

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