Leaf-Excluders prevent dirt and debris from entering drain connectors, ensuring proper rainwater runoff. Easy to maintain, weatherproof. Leaf-Excluders are used to stop dirt and various objects that could enter the drain and obstruct the regular flow of rainwater; to ensure maximum effectiveness, it is advisable to periodically clean any dirt that may be present from the drain opening. They are resistant to deterioration caused by the sun, ozone and other agents.