Vent pipes are essential components of a plumbing system, designed to allow air to enter and exit the drainage system. This airflow helps maintain proper pressure, preventing vacuum formation that could disrupt the flow of wastewater. By ensuring that waste can move freely through the pipes, vent pipes help to avoid clogs and backups. Typically made of PVC or cast iron, vent pipes extend from the drainage system to the outside of a building, often through the roof. They are connected to various fixtures, such as sinks and toilets, and play a crucial role in maintaining a safe and efficient plumbing system. Proper installation and maintenance of vent pipes are vital for preventing unpleasant odors and ensuring the system functions effectively.