The main purpose of stormwater systems is to collect, using interconnected gutters and pipes, runoff water created by rainfall or melting snow. A stormdrain consists of two parts – external (gutters under the roof) and underground (receivers and pipes that drain water from the house). Water from the roof enters the part that is in the ground, and then it is removed from the site. Functioning drainage is needed in order to collect excess water from the ground, i.e. drain it. The main task of drainage is to prevent an increase in the level of groundwater so that it will prevent flooding on the site. Since both systems provide for the removal of water into special storage tanks, the combined scheme of drainage and stormwater drainage is very effective in terms of functionality and costs. The collected water can be used for technical purposes, such as irrigation.