Understanding the Role of the Main Sewer Line in Your House The main sewer line in a house is the central pipeline that carries wastewater from your home’s drains to the municipal sewer system or septic tank. It connects all plumbing fixtures, including sinks, toilets, and showers. A blockage or damage in this line can lead to severe plumbing issues, such as backups or foul odors. Regular inspection and maintenance help prevent costly repairs.https://globalpostnews.com/designing-accessible-bathrooms-in-mississauga-safety-meets-style/