Sewage lines are underground pipes designed to transport wastewater and sewage from homes and buildings to treatment facilities. They play a crucial role in maintaining public health and sanitation by ensuring that waste is safely removed and processed. These pipes are typically made of materials like PVC or cast iron and are installed at a slight slope to facilitate the flow of waste. Proper maintenance of sewage lines is essential to prevent blockages and leaks, which can lead to environmental contamination and health hazards. Regular inspections and cleaning can help identify issues early, ensuring that the sewage system functions effectively and efficiently.