Upon arrival the homeowner showed us to the crawlspace where Atlanta gas light had located a gas leak at a union on the 1/2” gas branch. We turned on the gas to the home in order to test and confirm the leak. With the home owners approval we removed 2 sections of pipe and installed a new section of 1/2” black iron and union. After installing the new pipe and fittings we tested to confirm proper function and relit the water heater. No further issues detected at this time.