Brasscraft CSSD44-72 Gas Dryer and Water Heater Flex-Lines, Yellow Corrosion Resistant Coating Protects From Exposure To Harsh Cleaning and Plumbing Repair Products Stainless Steel Construction Ranges, Water Heaters and Cooktops Up To 49,100 Btu 100-Percent Leak Tested Approved For Lp (propane) and Natural Gas