Which statement is not supported by the described tests?

Which statement is not supported by the described tests?

• A. The installer is the only tester.
• B. An inspector must also test the medical gas and vacuum systems.
• C. The initial cross-connection test uses 14.7 psig.
• D. Piping purge tests dislodge foreign matter from the system.

Answer: (A)

Testing medical gas and vacuum systems relies on a sequence of checks to confirm there are no cross connections, the piping is free of debris, and the installation meets code with independent verification. The cross-connection test is performed at 14.7 psig to create a known pressure condition that reveals any unintended connections or leaks. Purging the piping serves to flush out foreign matter so the system is clean before it’s put into service. In practice, an inspector or qualified authority also reviews and tests the medical gas and vacuum portions to verify compliance and safety, rather than leaving all testing to the installer alone. Because of that, saying the installer is the only tester is not supported. The other statements align with standard testing practices: using 14.7 psig for the cross-connection test, purging to remove debris, and involving an inspector to validate the system.

Testing medical gas and vacuum systems relies on a sequence of checks to confirm there are no cross connections, the piping is free of debris, and the installation meets code with independent verification. The cross-connection test is performed at 14.7 psig to create a known pressure condition that reveals any unintended connections or leaks. Purging the piping serves to flush out foreign matter so the system is clean before it’s put into service. In practice, an inspector or qualified authority also reviews and tests the medical gas and vacuum portions to verify compliance and safety, rather than leaving all testing to the installer alone. Because of that, saying the installer is the only tester is not supported. The other statements align with standard testing practices: using 14.7 psig for the cross-connection test, purging to remove debris, and involving an inspector to validate the system.