Massachusetts Plumbers Journeyman Practice Exam

The minimum pressure required for testing water supply systems is generally established at 125 PSI. This value is set to ensure that the system can withstand typical service pressures while also allowing for adequate margin to identify any leaks or weaknesses in the plumbing. The 125 PSI standard is effective in evaluating the integrity of pipes, fittings, and connections, as it simulates conditions that the system may experience under normal operational circumstances. Ensuring that the system can handle this pressure is critical for safety and functionality in plumbing installations.