These 700 series gas valve uni-kits are designed for intermittent pilot, direct spark and hot surface applications. They incorporate a manual valve, pilot valve and a main gas pressure regulator. Each uni-kit includes all the necessary parts and instructions needed to convert to direct spark or hot surface applications. These valves are designed for many residential and commercial applications such as central heating units, wall heaters, boilers and mobile home furnaces. They also have all the wiring connections, manual selector and adjustments easily accessible. Use 1751-003 to convert valves to natural gas. Use 1751-013 to convert valves to l.P. Gas.