What is the minimum test pressure for domestic gas piping measured in inches of mercury?

The minimum test pressure for domestic gas piping is established to ensure the integrity and safety of the gas system. The standard requires a minimum pressure of 6 inches of mercury. This does not just verify that the system is free from leaks but also confirms that the piping can withstand operational conditions.

Testing at this pressure level is part of standard procedures for gas installations, as it helps identify any potential weaknesses or flaws in the piping system before it is put into service. It's a critical part of maintaining safety, as even minor leaks can lead to hazardous conditions. By adhering to this minimum pressure requirement, contractors ensure compliance with safety standards and regulations regarding natural gas installations.