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Double non-return valve
Scale 1:100 (meters)
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Double non-return valve
Dwg drawing of the valve and an example of application in a slab with disposable formwork.
The device is used to ensure protection of the rooms located on the underground floors against flooding caused by the backflow of rainwater and waste water.
The valve must be installed in the drain pipes and allows the normal flow of water into the sewer system.
Backflow can be caused by heavy rain, thaw or flooding.
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