【 Building materials network 】In the whole process of home decoration be launched Pipe installation is a matter of great concern, especially the installation of kitchen sewer. If you neglect this link, your kitchen life will be hidden in the future, because the sewer is one of the sources of odor. If it is not handled well, it will be bad if it stinks all day long. Therefore, we must be careful when installing the sewer. Don't worry, today I will introduce you to the relevant knowledge of kitchen sewer, and briefly introduce several methods for selecting the size and cleaning of kitchen sewer. I hope it will be helpful to you.

Select kitchen sewer mode
The kitchen drainage mainly includes lower drainage and side drainage.
Lower drainage: the lower drainage is that the drainage outlet is on the ground, and the sewer pipe vertically passes through the floor, The Conduit It leads directly to the downstairs. When installing the drainage, I used to install the return loop at the bottom, so that if there is other water, we can share a return loop.
Generally, 50 return bends are used for launching. If there are other drains, add tee , use the inclined tee on the way above, so that the water can flow smoothly. Most of the time, the kitchen drainage is quite complicated. Sometimes I go around by myself. The main reason why the waterway is difficult is that the place is too small, cupboard There are also other electrical appliances in it, such as garbage disposers, kitchenware Water purifier Wait, some have to be connected Washing machine Etc.
Side drainage: the outlet of side drainage is on the main pipe of the kitchen, and above the ground, part of the drainage pipe runs horizontally to the main pipe. There is a return loop under the floor for the down drain. If a return loop is installed above the floor, it is double odor proof. For the side drain, the down pipe is connected horizontally in the main down pipe, and generally only one return loop can be installed.
To sum up, it is necessary to have a general idea before launching the design. After designing on the drawings, the more important step is to "plan" on the site, that is pipe fitting Make a virtual connection and rehearse under the cabinet. Because the design on the paper is flat, there will be a big gap in three-dimensional installation. After the field design is completed, the next step can be the formal installation.
　　 Select the material of kitchen sewer
The current sewer pipes and accessories are generally PVC In the past, there were manufacturers in the building materials city that sold such materials exclusively. The quality was quite good. The pipe wall was thick and very smooth. Now the quality of the building materials market is much worse. There is no place where such materials can be sold professionally. The quality of sewer pipe fittings in general large building materials supermarkets is good. PVC sewer pipes are easy to install and can be installed by oneself. The installation by oneself is no worse than that by the construction team. Even if you don't want to do it, you'd better design it first and then take the workers with you.
First, let me introduce you to the drainage pipe fittings basin There are 50, 40 and 32 specifications of the sewer pipes of the pool. These numbers represent the caliber of the pipes, namely 5 cm, 4 cm and 3.2 cm. The pipe fittings are also of this specification. Commonly used pipe fittings include sewer, tee 90 degree elbow , 45 degrees Elbow And return bends, etc.
There are also various reducers, which can connect pipes of different models together. Note that the shape of the return bend in the following figure is different from that above. There are two types of return bends, one is circular, the other is triangular. The return bend in the following figure is circular, so there is more room for installation.
Here is a special introduction PVC pipe fittings If both ends of the expansion joint are hard pipes, the expansion joint must be used for connection, otherwise it cannot be connected. The function of expansion joint is a little like Galvanized pipe When I remove the basin, I unscrew the expansion joint and take out the basin with the tube.
　　 Selection of kitchen sewer size
When it comes to the selection of the size of the kitchen sewer, the first thing to do is to look at the kitchen water tank What is the following size? Then buy a kitchen sewer of the same size according to this size. The size of kitchen drain pipe mainly focuses on pipe diameter, diameter, internal diameter, external diameter, length, etc., while the standard diameter is about 30mm. The kitchen drain pipe introduced by Xiao Bian is 600mm long and 800mm long, and its size and specification are 800mm. It is made of high-quality stainless steel, which is made by professional technology, and is resistant to high temperature, corrosion, water leakage Avoid blasting and damage.
　 Kitchen drain pipe size
The selection and size selection of kitchen drain pipes were described. Now I will tell you about the size of kitchen drain pipes. At present, the commonly used sizes are as follows: 32, 90, 50, 40, 75110125160 (unit: mm). These kitchen drain pipes are mainly used for decoration under the kitchen sink. According to the size of the kitchen drain pipes, There are also stainless steel, PVC, plastic and other materials, most of which are of this specification.
　　 Installation of kitchen sewer
The installation of water is basically made of PVC pipe fittings. The cost of pipe fittings is not high. Although it is troublesome, others always feel that the installation is not as pleasant as their own. The water glued with PVC pipe fittings is relatively solid and can be used continuously without modification.
Connect the sink to the water: 50 thick pipes are used. Under the sink, I use expansion joints to connect with 50 pipes, all of which are hard pipes.
However, if the drainage is particularly simple, there is no need to return to the water bend. For example, there is only one kitchen sink for drainage, and there is no other drainage. Because the sink has a matching odor prevention device, and the quality of the sink's downcomer is very good, it seems to be 40 (most of them were 32 downcomers, but only hoses). When I installed it, I did not change the 50 pipe, but directly connected to the 50 downcomer with a reducer.
Connection of multiple sewers: sometimes when there are multiple sewers in the kitchen, it is necessary to add a three-way connection. The three-way connection can be vertical, horizontal and mitered. Sometimes there may be insufficient space, so it is necessary to cut the tee short, or change the direction of connection, and also mention the tee pipe fittings. The water outlet in the middle of the pipe fittings is mostly 90 degrees, and the middle of the pipe fittings is inclined, which is easy to use. When selecting pipe fittings, try to choose such a way, which can reduce the use of a 45 degree bend head, as well as a cross. When connecting multiple pipe fittings, it is better to use a cross, Many shapes can be changed with these water pieces. The outlet of the pipe fittings can be installed from front to back, from left to right. In the narrow place of the sink, it is necessary to try back and forth in this way to find a better position.
Connecting PVC sewer pipes: I used to take workers with me to connect the sewer pipes. Because the measurement in the cabinet could not be so accurate, plus several sewer pipes, the bonding was not good. Once the PVS pipes were glued, they could not be changed. In addition, the PVS pipes that were glued in this way would be invalid once additional water (such as dishwasher) was added. Later, a friend of mine, Xiao W, helped me install the sewer for my family. He helped me to correct it once, and then he understood it all (he was a professional plumber, but generally the sewer would not be as complicated as me). The second thing was to correct the sewer for me. When the upper tube was inserted into the lower part when taking over, there was no glue. When I heard him say this, my heart suddenly brightened. At that time, my reaction was "Why didn't I think of it before?" The upper pipe is inserted into the lower pipe, so no glue will leak out. The advantage of this method is that it can be adjusted after all connections are completed. Since the lower pipe is not stuck, the pipe can still rotate, so it is not difficult to install it. If the pipe is changed, the original pipe will not be invalidated.
　　 Kitchen sewer cleaning
If the kitchen sewer has been used for a long time, it is inevitable that there will be odor and foul smell, or blockage. In this case, how to clean the kitchen sewer? Now there is a special solvent for cleaning the kitchen sewer and a special tool for dredging the pipeline on the market. If you use cleaning solvent, you need to pour the cleaning solvent into the kitchen sewer, wait about 20 minutes, and then clean it with clean water; If the cleaning is done with tools, just put the tools into the kitchen sewer for dirt treatment, and then rinse with clean water.