The _____ is responsible for performing tests on plumbing piping systems.

The permit holder is responsible for performing tests on plumbing piping systems because they have the legal authorization to carry out the work covered by the permit granted for that specific plumbing project. The permit holder is usually required to ensure that all plumbing installations comply with local building codes and standards. By being directly involved in the testing process, they can ensure that systems function correctly and safely before they are put into operation.

Additionally, the permit holder often has a vested interest in the project and is typically knowledgeable about the plumbing standards that must be met. This role includes ensuring that all tests, such as pressure tests for water systems or drainage tests for waste systems, are performed according to the specified regulations and procedures required by local plumbing codes.

In contrast, the other individuals mentioned in the options do not hold the same level of responsibility in this specific context. While code officials may oversee compliance and safety standards, they do not perform the tests themselves. Similarly, although the owner may have an interest in the plumbing systems' functionality, they typically do not engage in hands-on testing; rather, they rely on qualified professionals. The person doing the work, who may or may not be the same as the permit holder, is involved in the installation and may help conduct tests but is not necessarily