5. Flow system (schematic diagram): 51 Container with water. 42 Pump. Operates by means of a vibrating piston. 45 De-airing unit. Makes sure that the pump will really start to pump water when boiler and tubes are empty. 29 Boiler with element. 17 Steaming device. 10 Distribution unit. Allows to select between making coffee and producing steam. 12 Pressure unit. Maintains a continuous pressure in the boiler during steaming. 32 Flowmeter measures the amount of water by means of a blade wheel inside, to be used for programming the electronic control (see Direction for use). Note: Figures refer to items on the exploded view drawing