Is the flange of the flexible waterproof casing placed inside or outside the wall during installatio

Flexible waterproof casing is made of 02S404 drawing set, by the main body of the pipe, two water stop ring, a flange, flange cover, bolts, nuts, rubber ring into. The structure is complex, and its length is the thickness of the wall. It is suitable for structures where the pipeline passes through the wall subject to vibration or with strict waterproofing requirements.
The difference between flexible and rigid waterproofing, the most obvious difference is that the materials are different, then the practicality of what can be provided will certainly be different. Flexible waterproof casing is not only good for waterproofing and stopping leaks, but also has the role of easy installation and easy disassembly.
The general flange is placed outside the wall, or in the indoor trench, depending on the specific pipeline supply, liquid and gas have different provisions. After the installation of the pipeline, the rubber seal is placed inside, the flange piece is pressed, and the screws are tightened. This will play the role of waterproofing and stopping leakage. So the flexible waterproof casing set is generally used in the walls of buildings with moisture-proof regulations, compared to rigid waterproof casing because of the sealant ring, clutch pressure plate and thus the relative strength of airtightness. When there are special requirements, engineers should purchase and use. If the material and outer diameter of the pipe through the wall exceed the requirements of the set, attention should be paid to the necessary adjustments and corrections to the structural form, size and filler used in the waterproof casing.