What’s a Rain Head?

The filtering process can be augmented by using a rain head—a downspout that incorporates a self-cleaning system. This unit has a funnel topped by a screen, which is set at an angle of about 33 degrees to the lower horizontal edge of the funnel. As the water washes over the angled screen, the debris is forced toward the screen’s lower edge and away from the building, while most of the rainwater continues through the funnel screen.