A system being leak tested should show no increase or decrease in the pressure reading for a period of ______________.

For a system being leak tested, maintaining a stable pressure reading for a period of three minutes is crucial to verify the integrity of the system. This timeframe allows for an adequate assessment of potential leaks. If there is no increase or decrease in the pressure during this period, it indicates that the system is likely intact and free from leaks, ensuring safety and reliability.

While shorter durations like one minute may seem sufficient, they may not capture minor leaks that can manifest over a longer observation period. Similarly, while five and ten minutes could provide additional assurance, three minutes represents a widely accepted standard that balances thoroughness with practicality in leak detection procedures. This standard is in line with industry practices, ensuring that potential issues are identified without unnecessary prolonged testing times.