What does the plumbing code specify about the testing of plumbing systems after installation?

The correct answer highlights that plumbing systems must undergo pressure testing after installation, as specified by the plumbing code. Pressure testing is essential to ensure that the plumbing system is secure, leak-free, and capable of handling the intended operational pressures. This testing verifies the integrity of joints, fittings, and the overall system, ensuring that any potential issues can be identified and rectified before the system is put into service.

This requirement is critical for maintaining safety standards and preventing future leaks that could lead to property damage or health hazards. Visual inspections alone may not detect hidden flaws that pressure testing can elucidate, making this a crucial step in the installation process. The significance of this testing underscores the importance of adherence to regulatory standards in plumbing work, ensuring both functionality and compliance with safety codes.