Gas water heater with big capacity tank and pilot flame particularly suitable for floor installations. It is equipped with a large magnesium anode functional for the electrochemical protection of the enameled steel boiler. It allows the user to adjust the temperature thanks to the front knob. The water heater is easy to install as it does not require electrical connections. It is available in four capacities: 120, 150, 200 and 300 liters.