Waste Water Engineering
Sewer ventilating columns are generally placed at

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

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Waste Water Engineering
In case of sewer lines

Test for straightness is carried out with the help of a lamp and mirror
Water test is carried out to check water tightness of the joints
Obstruction test is carried out with the help of smooth ball of diameter 13 mm
All listed here

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Waste Water Engineering
Stone ware pipes are

Especially suited to pressure pipes
Highly impervious
Highly resistant to sulphide corrosion
Hydraulically efficient because of their smooth interior surface

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