For a low pressure air test, what psi pressure should be used according to IAPMO?

The correct psi pressure for a low pressure air test, according to IAPMO (International Association of Plumbing and Mechanical Officials), is 5 psi. This standard is established to ensure that the plumbing system can effectively contain air without any leaks, as low pressure air testing is a method used to verify the integrity of the system before it is placed into service.

By using a pressure of 5 psi, it is sufficient to verify that the system is airtight while remaining within safe limits, reducing the risk of damage to the pipes and components during testing. This pressure level is a commonly accepted standard in the plumbing industry because it provides a reliable means to detect leaks while not exceeding the safe operating limits of typical plumbing materials.

Understanding the appropriate testing pressure is crucial for plumbing contractors, ensuring compliance with codes and maintaining safety and efficiency in plumbing systems.