With the help of rainwater system the water coming off the roof is led down. The principal parts of the rainwater system are horizontal eaves gutters and rainwater downpipes branching off from them. The measurements of gutters and pipes as well as the number of downpipes depends primarily on the amount of water coming off the roof and the form of the roof. The location of gutters and pipes should be designed each time specifically so as to provide for the water load to be distributed between parts of the system as evenly as possible, so that in terms of appearance, the gutters and downpipes would be located naturally. Usually pipes are located at the corners of the house and between windows.
There are two types of rainwater system: