Plumbing codes are regulations that set the standards for the design, installation, and maintenance of plumbing systems. These codes ensure that water supply and waste disposal systems are safe, efficient, and environmentally friendly. They cover various aspects, including materials, pipe sizes, and fixture requirements, to prevent issues like leaks and contamination. These codes are typically enforced by local or state authorities and may vary by region. Compliance with plumbing codes is essential for obtaining permits and passing inspections during construction or renovation projects. Following these guidelines helps protect public health and ensures reliable plumbing systems in homes and buildings.