What minimum pressure is required to test a drainage system with air?

The minimum pressure required to test a drainage system with air is 5 psi. This standard is established to ensure the integrity and functionality of the plumbing system. Testing at this pressure helps identify any potential leaks, which could lead to significant issues such as water damage or health hazards.

By maintaining the test pressure at 5 psi, you ensure that the system can withstand regular operational pressures. This testing method is crucial because air is not only readily available but also allows for easy detection of leaks due to noticeable sounds and visual indicators if there is a failure. Focus on maintaining this specific pressure helps regulate the testing process across various plumbing systems, ensuring their reliability and safety when put into service.

The other pressures listed do not meet the established standard; hence, they are not advised for use in testing drainage systems whereas 5 psi is the recognized minimum for a thorough air test.