Тут похоже авторы мешают в кучу infrastructure и installation .... Disinfection: • Before disinfection, the water infrastructure must be cleaned with a foam cone. After cleaning of the temporary water infrastructure, the complete installation, including the existing water infrastructure, must be disinfected by a certified company. For the disinfection process, the temporary installation must be disconnected from the main supply point. The disconnected infrastructure will be filled with sodium hypochloride. The chloride must remain in the whole temporary infrastructure for at least four hours. The complete infrastructure must then be thoroughly flushed with at least three times the content of the installation at a minimum speed of 1.5m3/s. Continuous measurements must be taken until the chloride has been flushed out of the infrastructure.
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