Which components are included in a roof drainage system?

A roof drainage system is specifically designed to manage rainwater runoff from the roof of a building. The primary components of this system include gutters, downspouts, and splash blocks.

Gutters are channels that run along the edges of the roof, collecting rainwater as it flows off the roof surface. This collection is crucial to prevent water from damaging the building's foundation and landscaping. Downspouts are vertical pipes that carry the water from the gutters down to the ground, directing it safely away from the structure. Finally, splash blocks are placed at the base of the downspouts to help disperse the water away from the foundation, reducing the risk of erosion and water pooling.

The other options provided include components that serve different functions. Pipes, valves, and pumps are typically associated with water supply or irrigation systems rather than roof drainage. Tanks, leach fields, and treatment systems pertain to septic systems, which manage wastewater rather than rainwater. Monitors, sensors, and alarms are more relevant in the context of security systems or environmental monitoring rather than specifically addressing roof drainage. Thus, the choice highlighting gutters, downspouts, and splash blocks accurately reflects the components necessary for effective roof drainage.