Original black iron gas piping from North Miami’s 1950s and 60s building boom can still be perfectly serviceable, since the material itself holds up well, but every connection and fitting along its length is worth assessing rather than assumed fine on age alone.
A pressure test is the actual way to confirm a line is holding, rather than relying on the absence of an obvious smell, since a small leak can exist well below the level most people would notice on their own.
Any new gas work in Miami-Dade, whether extending a line to an outdoor grill or converting an appliance, requires a permit and an inspection before it goes into service, regardless of how minor the job looks.
A suspected gas leak, any smell of rotten eggs or a hissing sound near a line or appliance, is treated as urgent every time, with the household advised to leave and call from outside if the smell is strong.