During a sanitary drainage (DWV) pressure test at 5 psi, how long must the pressure be held to pass inspection?

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Study for the NOCTI Plumbing Test. Prepare with flashcards and multiple choice questions, each question comes with hints and explanations. Ensure your success on the exam!

Multiple Choice

During a sanitary drainage (DWV) pressure test at 5 psi, how long must the pressure be held to pass inspection?

Explanation:
Holding the test pressure for a set period checks that the piping can keep a defined pressure without leaking over time. For a sanitary drainage (DWV) pressure test at 5 psi, the standard duration is 15 minutes because this length of time lets any slow leaks become noticeable and lets the system stabilize after being filled. If the pressure remains steady for 15 minutes with no drop and no visible leaks, the installation passes inspection. Shorter times might miss gradual leaks, while longer times aren’t typically required by standard practices.

Holding the test pressure for a set period checks that the piping can keep a defined pressure without leaking over time. For a sanitary drainage (DWV) pressure test at 5 psi, the standard duration is 15 minutes because this length of time lets any slow leaks become noticeable and lets the system stabilize after being filled. If the pressure remains steady for 15 minutes with no drop and no visible leaks, the installation passes inspection. Shorter times might miss gradual leaks, while longer times aren’t typically required by standard practices.

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