What does the term 'fall' refer to in drainage layout?

The term 'fall' in drainage layout specifically refers to the slope or incline of the drainage pipes that is essential for promoting the flow of water. A proper fall ensures that gravity assists in moving effluent through the pipes, which is crucial for preventing blockages and ensuring the efficient functioning of the drainage system. If the pipes are not set at an appropriate angle, water may not flow adequately, leading to pooling and potential backflow, which can cause significant issues in drainage functionality.

Understanding the correct fall also helps in meeting local building codes and standards, ensuring safe and effective discharge of wastewater. Therefore, the slope of the pipes is a critical aspect of the overall design and operation of a drainage system.