Gas pressure test for lines 200 ft or more requires which pressure and duration?

• A. 15 psi for 60 minutes
• B. 20 psi for 30 minutes
• C. 10 psi for 120 minutes
• D. 25 psi for 45 minutes

Answer: (A)

The test relies on using a practical level of pressure that can reveal leaks along a long run without stressing the pipe too much, and a duration long enough to show slow leaks that may not appear immediately. For lines 200 ft or longer, applying 15 psi and holding it for 60 minutes provides that balance: the pressure is high enough to push out any leaks at joints and fittings, yet not so high as to risk damage to the piping. The one-hour hold time gives enough opportunity for slow leaks to become evident as the pressure tends to drop if a leak is present. If the pressure remains steady for the full hour, the line is considered leak-free under test.