Stormwater drainage is a system that channels rainwater as it comes off the roofs of buildings and off paved or unpaved areas to an appropriate and legal point of discharge. The role of the licensed plumber is to design a stormwater drainage system that prevents flooding or contaminants from entering the stormwater water catchment area. Even if you decide not to design the system yourself, as the licensed plumber on site, you will be responsible for ensuring the compliance of the system.

You need to be familiar with the basic principles that guide good stormwater design.

Groundwork provides this.

As you work through the Toolbox you may find that you want to return to Groundwork to help you complete the activities.

The image is of a house and its stormwater connections. It shows that rain falling on the roof runs down a roof downpipe, which connects with a sub-drain. Groundwater that falls into a stormwater pit also flows into this sub-drain. The water, along with any collected in the curbside drain, flows into a stormwater drain, then into a major stormwater drain. Eventually all the water flows into the lake.