A clogged drain occurs when water cannot flow freely through pipes due to blockages. These blockages can be caused by various materials, such as hair, soap residue, food particles, or grease. When a drain is clogged, it can lead to slow drainage or even complete backups, causing inconvenience and potential damage to plumbing systems. To address a clogged drain, homeowners often use methods like plungers or drain snakes to remove the obstruction. In some cases, chemical drain cleaners may be used, but they can be harsh on pipes. Regular maintenance, such as cleaning filters and avoiding disposal of inappropriate items, can help prevent clogs in the future.