What is the required test pressure for air on a sanitary drainage system?

The required test pressure for air on a sanitary drainage system is 5 psi. This level is established within the Massachusetts Plumbing Code to ensure that the system can maintain structural integrity and provide proper operation without leaks. Testing at this pressure helps to confirm that any potential weak points or failures in the system can be identified before the system is put into use.

Maintaining an air pressure test at 5 psi allows for a reasonable balance between ensuring the system's reliability and not applying excessive pressure that could lead to unintended damage. The code specifies this value based on industry standards that have been developed through best practices and practical experience in plumbing installations. It's essential for plumbing professionals to adhere to this requirement to ensure compliance with safety regulations and proper system functionality.