During installation, where must a cleanout be located in a drainage system?

The requirement for a cleanout to be located at each change of direction in a drainage system is essential for maintaining the system's functionality and ease of access for maintenance. Cleanouts are necessary to allow for the removal of blockages and the inspection and cleaning of pipes.

When the water or waste in a drainage system changes direction – for instance, at a bend or a tee – there is a higher likelihood of buildup or clogs occurring at these points due to changes in flow dynamics and sediment settling. Installing a cleanout at each change of direction ensures that these critical points can be easily accessed for routine maintenance, helping to prevent larger issues down the line.

In addition to facilitating repairs and maintenance, having cleanouts at these junctions plays a significant role in the overall efficiency and longevity of plumbing systems. This configuration aligns with the plumbing codes and best practices considered during system design and installation.