1. Usage and function: it is mainly used to wrap the vertical column in the sewer pipe, so as to prolong the service life and reduce the use disputes between the adjacent spaces on the upper and lower floors.

2, the basic operation:

① Seal the sewer (water pipe) with red (sand) brick and 1: 3 cement mortar to form a square column with two or three sides.

(2) Brick sticking: use glazed tiles as the bottom horizontal line to start the bottom line of the first row of bricks, and stick them from bottom to top. Generally, 1: 2 cement mortar is used.

③ Clean the joints. The whole wall is pasted. Empty drum, uneven joints and unequal defects found in self-inspection shall be reworked and repaired in time. After all qualified, wipe it with clean water or cotton yarn, and coat the joint with cement slurry consistent with the color of ceramic tile, wipe it evenly with cloth and embed it to prevent water seepage.