Robertshaw 700-511 3/4" Natural Gas Valve for Pool Heater Replacement - Perfect for Inground & Above Ground Pool Heating Systems

700 Series - millivolt. The Robertshaw 700 Series millivolt gas valves are wall thermostat actuated combination controls which provide installation flexibility from furnaces to swimming pool applications. The complete line of 700-500 millivolt gas valves offers a wide range of replacements from small capacity 3/8 inch pipe to high capacity 1 inch pipe up to 720, 000 BTU usage. made in United States. Manufactured by Robertshaw controls company.