Waste Water Engineering
Maximum permissible velocity 1.5 m/sec, is adopted in drains

With beds of rocks and gravels
Neither A. nor B.
Lined with stones
Both A. and B.

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Waste Water Engineering
The sewers

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

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