Waste Water Engineering
The sewers

All listed here
Must flow under gravity ½ to ¾ full
Must be of adequate size to avoid over flow
Must be laid at least 2 to 3 m deep to collect /water from the basements

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Waste Water Engineering
The sewer pipes

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

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