The 710 low capacity gas heating valves are designed for space heaters (replaces B-67) and other applications with limited space. All models include a manual valve (gas cock), automatic pilot safety valve, pilot outlet, pilot gas filter and pilot adjusting key. The control can be mounted in any position except upside down and all models have 3-position outlets. Regulated 710 series gas valves can be converted from natural to L.P. gas by using the replacement pressure regulators. Use 1751-003 to convert gas valves to Natural Gas. Use 1751-013 to convert gas valves to L.P. Gas. Major changes to the terminals on millivolt valves were made in 1996. For 12 VDC applications use 24 volt models. 1000 BTU/Cu. Ft. 0.64 sp. gr. natural gas @ 1" W.C. pd.