A manhole is a unit built underground to grant access to
utilities like drainage systems and sewer systems. With the help of these
inspection chambers, the underground utilities are inspected, maintained,
modified, and cleaned.
Purpose of a Manhole
The Manhole serves the following purpose.
- It is used for cleaning,
inspection, and eliminating any hindrance present in the sewage lines.
- The change of direction, the
joining of sewers, as well as the alignment of the sewers, can be
performed with the help of these inspection chambers.
- The perforated cover of the
Manhole helps in the escape of the foul gases. It is a perfect means of
ventilation for underground sewage systems.
- It aids in laying the sewer lines
in the conventional lengths.
Features of a Manhole
The main components of the Manhole are the ring, chamber, and
the vertical circular pipe. This vertical circular pipe is accessible in
varying sizes and depths. These are employed the access the inspection joints
in the system. Manholes are sited usually 0.5m away from the curb lines of the
street. It is constructed in a way so that it remains away from the wheel line
of the traffic. The Manhole also has a cover, a plug that keeps the Manhole
protected from unauthorized access. These covers can either be circular,
square, or rectangular in shape. The most preferred material for the Manhole is
stainless steel because of the unlimited benefits it has to serve.
The stainless steel manhole is light in weight
and resistant to rust and corrosion. The stainless steel keeps the contaminants
out as it is a hygienic material. It is also a highly secured material and
reduces the chances of any thefts that could happen. The best factor is it is
also very economical in rates.
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