AIMS OF
BUILDING DRAINAGE
1. To drain
away the liquid waste produced as quickly as possible so as to avoid nuisance.
2. To prevent the entry of foul gases from the
sewer line.
3. To provide facilities for the quick removal
of foul matter such as human excreta from the water closets.
4. To collect
the sewage systematically for its further conveyance treatment and disposal.
5. To provide
healthy and aesthetic environment in the building.
REQUIREMENTS OF GOOD DRAINAGE SYSTEM IN BUILDINGS
The following are the requirements of good drainage system in a building:
1. The drainage pipes should be strong and durable.
2. The pipes should be of non-absorbent materials.
3. The pipes and joints should be airtight to prevent the leakage of waste water or gases.
4. The network of pipes should have sufficient accessibility for inspection cleaning and removing the obstructions.
5. The levels of building, sewer and other points of outlet should be fixed accurately.
6. The system should not give scope for air locks or self or induced syphonage, deposits, obstructions etc. which interfere with the functioning of drainage.
7. As per as possible drains should not pass under the buildings.
8. The drains should be given proper ventilation to avoid air locks and syphonage.
9. The system should have traps at all necessary points.
10. The foul matter should be quickly removed away from the sanitary fixtures so as to avoid the putrefaction and production of bad smelling gases.
I1. The drainage system should be able to prevent the entry of gases, vermin etc from the sewer into the building.
12. The branch drains should be as short as possible.
13. The drains should not pass near or under the trees to avoid the damage of pipes by the roots.