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Simply if you remove the ventilation then you create a cl0sedclosed tube where the « piston » ie waste is trying to create a vacuum behind it, that is, untill it can draw past the liquid in the u-bend...
Simply if you remove the ventilation then you create a cl0sed tube where the « piston » ie waste is trying to create a vacuum behind it, that is, untill it can draw past the liquid in the u-bend...
Simply if you remove the ventilation then you create a closed tube where the « piston » ie waste is trying to create a vacuum behind it, that is, untill it can draw past the liquid in the u-bend...
Simply if you remove the ventilation then you create a cl0sed tube where the « piston » ie waste is trying to create a vacuum behind it, that is, untill it can draw past the liquid in the u-bend...
