Picture of a drip leg or sediment trap at a furnace in the garage. These are a great device to help catch sediments from entering a gas fired appliance such as a furnace or water heater. Most manufacturers require them to help void the warranty. When not present we highly recommend them and are not often found on older gas fired appliances here in San Diego. For more information on drip legs or sediment traps please call us at 760-525-5340.