What pressure must a water test hold in the pipe for at least 15 minutes?

In plumbing, a water test is commonly performed to ensure that the installed pipe system is leak-free. The pressure that must be held during this test is typically expressed in terms of feet of water head. This measurement reflects the height of a column of water that corresponds to the pressure in the system.

To meet the requirements of a proper water test, the selected standard is that the test must hold at least 10 feet head of water for a duration of 15 minutes. This standard is set to provide a sufficient pressure that can reveal any potential leaks or weaknesses in the system's joints, fittings, or overall integrity. Holding the system at this pressure for the specified time allows plumbers to confirm that all components are reliable before proceeding with additional construction or installation phases.

Understanding this standard is important for ensuring compliance with plumbing codes and maintaining the safety and reliability of water distribution systems. Therefore, the correct choice reflects the recognized industry standard for conducting an effective water test in plumbing systems.