DL120 gas water heater control valve (thermostat) establishes itsexcellence among its competitors by continuous technical improvements.It is finely designed to optimize energy saving, stable operation andconvenience for use. We also support special design specifications upon request.Thermostat rangeDifferential 30-70 oC<14 oC35-75 oC<14 oC40-80 oC<14 oC Gas Connections :