On a gas piping plan, a note reads "2 PSI system." For planning, what does this primarily affect?

Giải thích

A 2 psi gas delivery pressure lets smaller pipe carry the same load but requires a line pressure regulator downstream to drop to appliance pressure, and the sizing tables differ from a standard low-pressure system. Recognizing the system pressure on the plan drives correct pipe sizing and regulator placement. Using the wrong sizing basis under-sizes or over-sizes the gas main.