Who provides all items necessary to test a building's plumbing drains or water lines?

• A. Building owner
• B. Plumbing contractor
• C. City inspector
• D. Architect

Answer: (B)

Testing the plumbing system is handled by the installer, who brings and uses all the necessary equipment to verify the drains or water lines meet code. The plumbing contractor arrives with test plugs, caps, test tees, gauges, hoses, and the required water or air sources, and performs the hydrostatic or air test to ensure there are no leaks and that the system holds the specified pressure. The city inspector may witness and sign off on the test, but does not supply the testing materials. The building owner funds the project but does not typically provide the testing gear, and the architect designs the system but does not furnish the test equipment. So, the plumbing contractor is the one who provides all items needed to test the installation.