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Three important points to check in the ventilation branch system: Check the maximum distance between a backflow preventer and a ventilator tube, as indicated in table 01 of NBR 8160. Connect the ventilation branch at a minimum height of 15 cm above the overflow level of the highest equipment. Respect the recommendation of a minimum distance of at least two diameters from the discharge branch to insert the ventilation branch. These points are essential to ensure an efficient sanitary sewage project. Come watch the full class! Read the content on our blog: Sewage ventilation pipe: how to size and install https://thorusengenharia.com.br/venti... Follow us on Instagram @thorusengenharia Subscribe so you don't miss any more videos like this!