下水道管道堵塞是日常生活中很常见得一种问题，下水道疏通一般分为几种：
Sewerage pipeline blockage is a common problem in daily life. Sewerage dredging is generally divided into several types:
1、新安装管道时不小心掉进异物或是安装失误导致得堵塞，一般采用管道疏通机直接疏通或是更换管道；
1. When new pipes are installed, foreign bodies fall into the pipes carelessly or blockage is caused by incorrect installation. Generally, pipe dredgers are used to dredge or replace pipes directly.
2、有些管道经过一段时间使用后会出现结垢，使得管道内径变细影响正常下水排放，这种疏通必须采用高压水清洗管道，清除管道内壁得污垢从而扩大下水管道内径。
2. Scaling will occur in some pipelines after a period of use, which makes the inner diameter of the pipeline thinner and affects the normal discharge of sewage. This kind of dredging must adopt high-pressure water to clean the pipeline and remove the dirt on the inner wall of the pipeline so as to expand the inner diameter of the sewage pipeline.