This has me puzzled. My inlaws are buying a house and paid a home inspector to look it over before closing. He red tagged the 40 gal gas water heater with a note that said, "water heater has corrugated flexible gas line. Line should be solid pipe." This is the flex line from the shutoff to the t-stat, 12"-18" long. What gives? Every gas heater I've ever seen has these. It won't be a deal breaker for the inlaws, but we were all puzzled anyway.
David
David