Generally, the horizontal main drainage pipe and the first floor outlet pipe should adopt type a pipe, and the vertical drainage pipe and branch drainage pipe should adopt type W pipe. The advantage of this combination is that the mechanical performance of A-type pipe is better than that of flange gland connection, so the service life and function of A-type pipe can be guaranteed when it is used as horizontal main drainage pipe. At the same time, due to its good mechanical strength, it is especially suitable for high-rise horizontal drainage pipe, which can withstand the impact of upper water. W-shaped pipe is suitable for the selection of materials for drainage riser due to its quick installation and good interface flexibility. Especially when it is used as the installation and construction of horizontal drainage branch pipe in toilet and bathroom, the good interface flexibility and tightness can be used to control the slope of drainage pipe. At the same time, due to the characteristics of W-type pipe connector, combined with the current situation of residential project completion decoration (generally the toilet and bathroom drainage riser is exposed), when the riser is concealed decoration, it is convenient for decoration layout, can save space, and increase the actual use area. In addition, the use of A-type and W-type pipes together, in addition to the above reasons, but also because the remaining short material produced in the process of A-type pipe installation and construction can be used as the installation of ground drainage horizontal branch pipe, saving materials, has good economic benefits. The W-shaped pipe is connected by stainless steel throat hoop. The hose hoop is composed of a stainless steel hose hoop and a perforated bolt.

In the actual installation project, the above two kinds of pipes have good effect, which can not only meet the needs of construction quality and use function, but also save materials and reduce costs.