The Utica-Dunkirk VG-003.05 is a 24-volt natural gas valve that allows for precise control in HVAC systems. It is frequently used in gas-fired equipment, such as boilers and furnaces, and has a 3.5-inch water column rating and a 1/2-inch gas valve. Natural gas is necessary for the combustion process, and this gas valve is crucial in controlling its flow. #UticaDunkirk #Vg-003.05 #G... https://www.partshnc.com/vg-00305-utica-dunkirk-24v-35-wc-nat-12-gas-valve