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A good sewage system is essential for a healthy environment. Duraco caters for all your sewerage needs.

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A manhole or an Inspection Chamber is a vertical access chamber from the ground surface to the sewer network or other underground utilities. Manholes are usually positioned at a junction, to allow cleaning, inspection, connections, and repairs.

By definition, a manhole is a drainage or sewerage fitting used to connect drainage or sewerage installations and/or to change the direction of drainage or sewerage runs, which terminates at ground level with a riser shaft of 800mm minimum inner diameter.

Whereas, an inspection chamber is a drainage or sewerage fitting used to connect drainage or sewerage installations and/or to change the direction of drainage or sewerage runs, which terminates at ground level with a riser shaft of 200mm minimum outer diameter and an inner diameter of less than 800mm.

In general, manholes or inspection chambers should be provided in the following situations:

1.At all changes of direction on drains.

2.At all changes of gradient on drains.

3.At all drain junctions where cleaning is not otherwise possible.

4.On a drain within 12m from a junction between that drain and another drain unless there is an inspection chamber situated at that junction.

5.At all changes in pipe diameter.