Siphoning occurs when there is depressurization in a plumbing pipe. For this phenomenon to occur, four elements must be present:
Back pressure occurs when the pressure of the building's drinking water system is greater than the pressure of the municipal distribution network. When equipment is connected to the building's drinking water system, such as a boiler that generates steam, it causes an increase in pressure in the building's drinking water network. A backflow could then occur. Several mechanical-hydraulic applications can, by design, cause back pressure. Here are a few examples:
The following figure illustrates the phenomena of siphoning and back pressure:
There are several ways to protect drinking water from backflow. To learn more, contact our experts, they will be happy to answer your questions.
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