Waste Water Engineering
The sewers

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

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Waste Water Engineering
Traps

Are water seals which prevent the entry of foul gases
Create symphonic action to increase the quick disposal of sewerage
Are used to trap the rats entering sewers
Dissolve the foul gases

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