During a tightness test, a pressure drop occurs quickly. What is a likely first action?

During a tightness test, a pressure drop occurs quickly. What is a likely first action?

• A. Increase test pressure to overcome the leak.
• B. Ignore and proceed with the test.
• C. Inspect and reseal all test connections and seals, then reinitiate the test.
• D. Replace the tank entirely.

Answer: (C)

A rapid pressure drop during a tightness test signals a leak somewhere in the test setup, not just in the tank itself. The best first action is to inspect and reseal all test connections and seals, then reinitiate the test. This targets the most common cause of an immediate drop: a loose or improperly seated fitting, gasket, valve seal, or connector. By tightening or replacing these seals and ensuring all connections are correctly made, you can determine whether the loss was due to the test apparatus or to the tank, and you avoid chasing a fault that isn’t there. Increasing test pressure to overcome the leak can be dangerous and may mask the failure, while ignoring the drop or proceeding without addressing it risks safety and accuracy. Replacing the tank would be premature unless there is clear evidence the tank itself is damaged, so the prudent first step is to fix and recheck the test connections and seals before deciding on further actions.

A rapid pressure drop during a tightness test signals a leak somewhere in the test setup, not just in the tank itself. The best first action is to inspect and reseal all test connections and seals, then reinitiate the test. This targets the most common cause of an immediate drop: a loose or improperly seated fitting, gasket, valve seal, or connector. By tightening or replacing these seals and ensuring all connections are correctly made, you can determine whether the loss was due to the test apparatus or to the tank, and you avoid chasing a fault that isn’t there.

Increasing test pressure to overcome the leak can be dangerous and may mask the failure, while ignoring the drop or proceeding without addressing it risks safety and accuracy. Replacing the tank would be premature unless there is clear evidence the tank itself is damaged, so the prudent first step is to fix and recheck the test connections and seals before deciding on further actions.