DN350 waterproof casing flexible waterproof casing rigid waterproof casing

One is perforation installation, in which the flexible waterproof casing is inserted into the reserved hole, filled with cement and allowed to solidify before the pipe is penetrated into the wall. This method is used to install flexible waterproof casing on brick walls, infill walls and other walls. Construction process: Drill holes in the wall to fix the waterproof casing. The outer wall of the waterproof casing is filled with concrete and fixed. After solidification, the pipe is inserted to block leaks and the filler wall is corrected.
The other method is preset installation for concrete wall pouring. The waterproof casing is fixed in the wall formwork, and the entire wall and the waterproof casing are poured into the wall with concrete. This installation method is common in load-bearing walls of high-rise buildings and earth walls of civil air defense projects. It has the characteristics of safety, no leakage and long service life. The construction process is to fix the flexible waterproof casing in the wall formwork and pour the wall concrete. After the wall is solidified and formed, the pipe is passed through the wall to block leaks and fill.