Quality of a Good Drainage System

Qualities of a good drainage system is as follow according to Olojoba (2009);

1.            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.

3.            The bore should be circle and invert even.

4.            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.

6.            Adequate ventilation should be provided.

7.            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.

9.            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.

11.       A drainage system should be tight.

12.       Where a drainage trench passes 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.