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The Backflow Prevention Training Unit, "BFPT", designed by EDIBON, allows verifying the operation of multiple non-return devices. The system contains the most common backflow prevention devices used in the industry. The main objective is to recognize each element and study its function. It is a unit designed to allow both a group of students and two to work, since it has a circuit on each side of the structure. Both circuits contain the same elements and their operation is the same. Each circuit is composed of a water storage tank and a circulatory water pump that allows the flow of fluid through the circuit, driving from the tank and returning the water to it. The water flows through the pipes crossing different backflow preventers such as standard check valves, two types of double check valve assemblies, two types of reduced pressure assembly, pressure vacuum breakers and gate valves. In addition, it has ball valves to regulate the passage of fluid through the different pipes. There is the possibility of forcing the change of flow direction to check the proper operation of each element included in the circuit.