What should be checked before turning gas on in a new piping system?

Before turning on gas in a new piping system, it is crucial to ensure there are no open fittings and that all valves are closed. This step is vital for safety reasons, as any open fittings could lead to gas leaks, which pose serious risks, including fire and explosion hazards. Ensuring that all valves are closed prevents uncontrolled gas flow, allowing for a controlled and safe start-up process.

While other checks, such as examining fittings or cleaning the piping, are important in their own right, they do not directly address the immediate safety concerns associated with gas flow in a newly installed piping system. By verifying that there are no open fittings and that valves are secured, you are taking a fundamental precaution to protect both the installation team and future users of the system.