Layout of Building Drainage

The following aspects have to be considered in the design and construction of a drainage layout:

1. This layout should be simple.
2. All pipes should be laid in straight lines both in horizontal and vertical directions.
3. Abrupt changes in the direction of pipeline may affect the natural flow.
4. In the points of intersection of pipes and wherever bends occur, it is essential to provide inspection chambers or manholes.
5. The contained angle between the intersecting pipes should be less than 45° so as to ensure a gradual and smooth flow.
6. Sewers should not be ordinarily laid under a building. If it is inevitable a cast iron pipe should be laid in straight reach with a uniform gradient.