Downspout

A downspout, waterspout, downpipe, drain spout, roof drain pipe, leader, or rone (Scotland) is a pipe for carrying rainwater from a rain gutter.

Downspouts are usually vertical and usually extend down to ground level. The water is directed away from the building's foundation, to protect the foundations from water damage. The water is usually piped to a sewer, or let into the ground through seepage.