Select options Inline Downspout Cleanouts $32.00 – $59.00 The Downspout Cleanout contains a screen that prevents debris from clogging your drain. (Periodic cleaning of the screen is required.) Cleanouts are available in smooth round copper, .036 mill finish aluminum (priming and painting will be required before installation) and zinc for 4″ only. Aluminum is available in 3″ & 5″ only. Zinc is available for 4″ only.