Qualities of a good drainage system is as
follow according to Olojoba (2009);
follow according to Olojoba (2009);
1.
The drainage should be constructed of hard, smooth,
impervious materials
The drainage should be constructed of hard, smooth,
impervious materials
2.
The drainage should be laid on a sound foundation to a
suitable and even gradient to ensure a self cleansing velocity.
The drainage should be laid on a sound foundation to a
suitable and even gradient to ensure a self cleansing velocity.
3.
The bore should be circle and invert even.
The bore should be circle and invert even.
4.
Length of pipes should be true a straight lines
between changes of direction to
Length of pipes should be true a straight lines
between changes of direction to
obtain a truly cylindrical bore.
5.
Adequate means of access should be provided for
inspection and cleansing.
Adequate means of access should be provided for
inspection and cleansing.
6.
Adequate ventilation should be provided.
Adequate ventilation should be provided.
7.
Branch drains should be laid on straight lines to join
the main line in the direction of low.
Branch drains should be laid on straight lines to join
the main line in the direction of low.
8.
Where bends are used, the junctions curved obliquely.
Where bends are used, the junctions curved obliquely.
9.
All openings of the drainage system, except
ventilation openings should be efficient trapped, having a seal of not less
than 50 mm.
All openings of the drainage system, except
ventilation openings should be efficient trapped, having a seal of not less
than 50 mm.
10. Except in the cases of
necessity normal drain should pass under building.
necessity normal drain should pass under building.
11. A drainage system should be
tight.
tight.
12. Where a drainage trench passes
near a lead bearing part of a building concrete backfill is required.
near a lead bearing part of a building concrete backfill is required.
Reference
Olojoba, A. O. (2009); Fundamental of Industrial
and Environmental Health Management. Ughelli: Ama Ohoror Printing Press Coy.
and Environmental Health Management. Ughelli: Ama Ohoror Printing Press Coy.
