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<abstract language="eng">Vacuum pumps are very useful in physical, chemical and biological experiments. In this communication it is described the design of a compact and low cost water recirculating system employing a water-jet aspirator pump as the vacuum source. The system requires only a water pump, water-jet aspirator pump, commercial PVC water tubes and a drain connection

Construção de um sistema simples e compacto de recirculação d'água sob pressão para trompa d'água