Question 15

The minimum pressure that should be used for testing a copper water supply system is 50 psi.

To ensure the integrity and safety of a copper water supply system, a minimum testing pressure of 50 psi is required. This level of pressure helps to identify any potential leaks or weaknesses in the system before it is put into operation.

A) 5 psi

A testing pressure of 5 psi is insufficient for evaluating the integrity of a copper water supply system. Such a low pressure would not adequately reveal leaks or weaknesses, as the normal operating pressures of water systems are typically much higher.

B) 10 psi

While 10 psi is an increase over 5 psi, it remains too low to effectively test the copper water supply system. Similar to 5 psi, this level of pressure would fail to provide an accurate assessment of the system's ability to withstand operational pressures.

C) 50 psi

A minimum pressure of 50 psi is appropriate for testing a copper water supply system. This pressure level is effective in uncovering any potential leaks or weaknesses, ensuring that the system can handle the pressures it will encounter during normal use.

D) The working pressure of the system

Using the working pressure of the system for testing is not advisable as it may not be sufficient to detect leaks. Testing should be performed at higher pressures, specifically at 50 psi, to ensure a comprehensive evaluation of the system's integrity.

Conclusion

The correct minimum testing pressure of 50 psi is crucial for ensuring the safety and reliability of a copper water supply system. All other options, including 5 psi, 10 psi, and the working pressure, fail to provide the necessary assurance that the system can withstand operational conditions without issues. Testing at the correct pressure is essential for identifying potential problems before the system is put into service.