The waterproof casing is also called a wall casing and a wall pipe. The flexible waterproof casing is generally suitable for structures with vibration or tight waterproofing requirements when the pipeline passes through the wall. After the casing is partially processed, the primer is applied to the outer wall primer includes  or cold base oil . The waterproof casing is divided into a rigid waterproof casing and a flexible waterproof casing. The two are mainly used in different places. The flexible waterproof casing is mainly used in places where the human defense wall and the pool are in high demand. The rigid waterproof casing is generally used in the basement and other pipelines where the pipeline is required to be piped.

Pipes through walls and floors should be provided with metal or plastic casing. The casing installed in the floor should be 20mm above the decorative floor; the casing installed in the bathroom and the kitchen should be larger than the diameter of the pipe. Because the bathroom is easy to accumulate water, the top should be high. The decorative floor is 50mm, and the bottom should be level with the bottom of the floor; the two ends of the casing installed in the wall are level with the facing, and the leakage prevention between the casing and the floor is done. The gap between the casing and the pipe passing through the floor is filled with a flame-retardant dense material and a waterproof grease, and the end face is smooth.

The gap between the wall bushing and the pipe should be filled with flame retardant dense material, and the end face should be smooth. Installation instructions for rigid through-wall pipe 1. Flexible filler material: bitumen, hemp, polystyrene board, polyvinyl chloride foam board. 2. Sealing paste: polysulfide sealing paste, polyurethane sealant. When the casing penetrates the wall, if it is a non-concrete wall, the concrete wall should be partially changed, and the casting range should be 200 larger than the diameter of the wing ring . Moreover, the casing must be poured into the wall at one time. 4. The thickness of the concrete wall at the pipe should be less than 300. Otherwise, the side of the wall should be thickened or thickened on both sides.

The diameter of the thickened part should be at least D5+200. 5. The weight of the casing is calculated by  if the wall thickness is greater than 300 hours should be calculated separately. When the pipeline wears the concrete shear wall foundation, the beam is worn, and the special-shaped column is worn, it should be installed together with the civil works. The reason is that after the hole is reserved, the secondary casting between the casing and the concrete is not easy to handle; some cannot be handled, such as installing a rigid waterproof casing on the foundation concrete shear wall of the basement. 6. Installation before installing the pipeline, when the pipeline is worn through concrete slabs or ordinary brick walls, holes are generally reserved on the concrete slab, and ordinary brick walls can be cut through the wall. At the floor, before the safety pipe, the line is removed and the casing is installed. On the brick wall, draw lines, plant brackets, find the slope, and install the casing.