During an air/soap test on primary piping, what is the minimum test pressure required?

The minimum test pressure required during an air/soap test on primary piping is set at 50 psi. This pressure is established to ensure that any potential leaks in the piping system can be effectively detected. The air/soap test involves applying a sealed environment around the piping to observe for any signs of leakage, typically by observing soap bubbles forming in the presence of escaping air.

Maintaining the pressure at this level is crucial for thorough testing, as it allows for a sufficient margin to identify leaks that might not be observable at lower pressures. Tests conducted at pressures below this minimum can result in false negatives, where leaks go undetected, potentially leading to future environmental hazards or compliance issues. Thus, ensuring that the test is performed at 50 psi or higher is vital for the integrity and safety of the underground storage tank system.