First, I would have the Gas company install the line and meter.
Then, I would have the house plummed. Lines run from meter to furnace location, stove, dryer, etc.
Then, I would have the applinces installed and connected to the lines.
Then, the gas company has to inspect everything before turning on the gas. They do the soapy water test & look for leaks. They may be more high-tech now.
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