The answer to 'water line vs' is that water lines and sewer lines are two distinct plumbing systems in a home. Water lines bring fresh, clean water into the home, while sewer lines carry wastewater and sewage out of the home. Both are essential components of a home's plumbing infrastructure, but they serve different functions and have different installation and maintenance requirements.
Water lines are typically made of copper, PEX, or plastic piping, and they connect the home's main water supply to various fixtures and appliances. Sewer lines, on the other hand, are usually made of cast iron, PVC, or ABS plastic, and they transport wastewater from the home to the municipal sewer system or a septic tank. Maintaining both water and sewer lines is important to ensure the proper functioning of a home's plumbing system.