International Residential Code (IRC) Plumbing Test 2026 – 400 Free Practice Questions to Pass the Exam

Before a plumbing or drainage system can be used, it is essential for it to be inspected. The inspection process ensures that all installations comply with the relevant codes and regulations, which are crucial for safety, functionality, and public health. During the inspection, a qualified professional checks for proper installation, potential leaks, and the adherence to all applicable standards. This step protects both the homeowner and the wider community by minimizing the risk of plumbing failures that could lead to damage or health hazards.

Other options do not contribute to the safe use of a plumbing or drainage system. Damage would indicate a failure that needs addressing before use, running the system for an arbitrary period does not verify its compliance or safety, and relying on a homeowner to recheck systems is not sufficient, as they may not have the necessary expertise to identify code violations or potential issues.