Waste Water Engineering
Sewer ventilating columns are generally placed at

Distances 150 m to 300 m
Every change in the size of sewers
Upper ends of branch sewers
All listed here

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Waste Water Engineering
The stone ware sewers

Are used for carrying sewage and drainage from houses
Are manufactured from clays and shale
All listed here
After casting are dried and burnt at temperature 150°C, 700°C and 1200°C

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