Waste Water Engineering
Stone ware pipes are

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

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Waste Water Engineering
The pressure exerted by

The sewage when running full from inside, is called internal pressure
The internal pressure if any, causes tensile stress in the pipe material
All listed here
Pressure sewers are designed to be safe in tension

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