1. Heterogeneous drainage
1. Process standards
1) Locate the position of the drainage branch pipe of the sanitary device and determine the laying of the corresponding branch pipe;
2) set up hanger according to the arrangement of drainage branch pipe;
3) Installation of drainage branch pipes, and temporary plugging:
4) The drainage branch pipe passes through the ceiling to be decorated with rubber rings.
2. Sample photos
3. Quality standards
1) The slope of the pipeline is uniform and the direction is smooth;
2) The pipeline spacing meets the requirements, is firmly fixed, and the overall appearance is beautiful;
3) When the building plastic drainage pipe passes through the floor, firewall and tube well wall, the fire arresting device should be set according to the nature of the building, the pipe diameter and setting conditions, and the fire grade requirements of the crossing part;
4) The reserved mouth of the drainage branch pipe is sealed with a plastic cover;
5) After the installation of the drainage pipeline is completed, it is necessary to carry out irrigation and throughball test;
6) Check the slope and the quality of the pipeline interface, and only after passing can it be hidden.
2. Drainage on the same floor
1. Process practice
1) After the construction of the waterproof protective layer of the toilet is completed, the branch pipe of the drainage pipe on the same floor is installed;
2) Before the installation of the drainage horizontal branch pipe, the piping diagram should be made according to the design drawings and the reserved position on site, and the appropriate pipes and fittings should be selected for piping;
3) The horizontal branch pipe should be fixed with brick pier support, and the drainage slope should meet the design requirements;
4) If the connection between pipes and fittings is bonded by socket adhesive, the adhesive must meet the requirements of its product standards. Pipes, fittings and binders should be supplied by the same manufacturer;
5) After the installation of the drainage pipeline, the appearance quality of the pipeline and the installation size should be reviewed and inspected, and the reserved rejection of the drainage pipeline should be blocked;
6) After the installation of the drainage pipeline is completed, it is necessary to carry out irrigation and through-ball tests to check the slope and pipe interface quality, and it can be concealed only after it is qualified;
7) It is advisable to install a lateral floor drain at the bottom of the caisson.
2. Sample pictures
3. Quality standards
1) The specifications, models and performance of drainage pipes and fittings should meet the design and specification requirements;
2) The arrangement of the transverse branch pipe should ensure that the distance from the sanitary appliance to the discharge pipe is the shortest, and the pipeline turns the least;
3) The drainage slope of the transverse branch pipe should comply with the provisions of the code;
4) Set up the cleaning port according to the design requirements;
5) The depth of the water seal of the water trap shall not be less than 50mm.
4. Common quality defects and prevention and control
1) Poor drainage. In order to prevent such defects: the spout of the pipeline should be blocked in time to avoid construction garbage and other debris falling into the pipeline; The drainage pipe is constructed according to the design slope. It is strictly forbidden to have an inverted slope; Reasonable use of pipe fittings so that the flow of water is smooth.
2) The drainage pipe is not allowed to be shaken. In order to prevent such defects: before the installation of the pipeline, it is necessary to do a good job of positioning and pay-off - after the installation of the pipeline - fix the spout firmly.