Which of the following is not a type of pipe used in drainage systems?

Pressure pipes are typically designed to carry fluids under pressure, making them unsuitable for drainage systems where the flow is generally driven by gravity. In contrast, soil pipes, waste pipes, and storm pipes are all essential components of drainage systems.

Soil pipes are used specifically for the transportation of sewage and wastewater. Waste pipes handle the discharge of wastewater from sinks, showers, and other fixtures, while storm pipes are designed to manage and drain surface water and stormwater runoff. Each of these types plays a critical role in ensuring that drainage systems function effectively and manage water flow appropriately. Thus, pressure pipes do not fit into this category and, therefore, are not used in drainage applications.