Gas Heating Valve - 1/2" Inlet, 3/8" Outlet, Hi-Lo Pressure Regulator Is Designed For Fireplace Log Control And Other Limited Space Applications. Gas heating valve hi-lo pressure regulator is made of high quality materials for strength and durability. Regulators include a manual valve (gas cock), automatic pilot safety valve, pilot outlet, pilot gas filter, and pilot adjusting key. Units include 3-position outlets for mounting and location versatility. Valves may be converted from natural to L.P. gas via replacement pressure regulators. For 12 VDC applications use 24 volt models.