This L304 distillation apparatus can produce an output rate per hour of 4 litres of excellent quality distilled water. All glass elements are made of borosilicate 3.3, except for the resistance sleeve which is made of quartz. It operates on a bench, at an environment temperature of 25ºC, relative humidity between 45% and 70% and at a normal atmospheric pressure and is equipped with the necessary mechanisms that shut off the system should the water and/or the power supply fails. The water still L304 meets, in its conception and manufacture, the basic demands of: Directive 73/23/CEE – Directive of Low Tension, modified by Directive 93/68/CEE – and Directive 89/336/CEE – Directive of Electromagnetic Compatibility, modified by Directives 91/263/CEE, 92/31/CEE and 93/68/CEE.