Flex Connector for gas range is too big for the gas supply line
Got a new gas range. The old range had a yellow gas flex connector and fit perfectly on the brass flare end of the supply pipe, but the new steel connector is too big for the flare end fitting of the gas supply pipe, although just right for connecting to the range. The house was built in 1957, and the old range was installed about 20 years ago. Is there some kind of adapter or reducer I can use between the flex connector and the gas line, or do I need to have a new gas line fitted?