Ideal for homes with underground drain tiles or water harvesting systems. The Downspout Clean-Out filters micro debris. This product is for homeowners that want the benefits of a micro screen without the expense and constant maintenance hazards associated with them. Downspout Clean-Outs install at ground level, just above the underground pipe. This is a safe and manageable location to service when it is convenient for you. We recommend emptying out the basket after every rainfall, or whenever you see fit.