What are the installation and acceptance methods o

  • Detail

In home decoration, we should pay special attention to the installation of the sewer pipe. If the sewer pipe is not installed properly, it will easily lead to water leakage, so the sewer pipe should not only be of good quality, but also conform to the size. Only in this way can we build a good infrastructure for household drainage work. If you are interested in the relevant knowledge of sewer pipes, you might as well come with me to understand the relevant knowledge of the specifications of sewer pipes and the installation skills of sewer pipes, which may be helpful to you

sewer pipes are becoming more and more diverse and pay more attention to home decoration, among which the characteristics of wear resistance, easy maintenance and high cost performance are favored and concerned by more and more people. Household sewer is an important channel for drainage, and the owners are also most concerned about its purchase, specification and installation. Then, what is the general specification of sewer? What are the installation methods of sewer pipes? Today, I will introduce you the specification of sewer pipe and the tips of installation. I believe you will benefit a lot after reading the following introduction

specifications of domestic sewer pipes

General specifications of domestic water pipes include: DN15 (4-inch pipe), DN20 (6-inch pipe), DN25 (1-inch pipe), DN32 (1-inch 2-pipe), Dn40 (1-inch half pipe), DN50 (2-inch pipe), DN65 (2-inch half pipe), DN80 (3-inch pipe), DN100 (4-inch pipe), DN125 (5-inch pipe), DN150 (6-inch pipe), DN200 (8-inch pipe), DN250 (10-inch pipe), etc

water pipe φ 25× 1/2 means its outer diameter is 25. The actual corresponding nominal diameter is DN20 (also known as 6 branch pipes). You can buy a tap with 6 cents. You can also buy a 4-point faucet (just add a reducer between the pipe and the faucet)

the style and material of household faucets are ever-changing, but the screw thread part connected with the pipe is divided according to the size of 4 points, 6 points, 1 inch and so on. Don't worry about buying the wrong one

generally speaking, the 4 branch pipe is in inches, so the 4 branch pipe is 1/2 inch (4/8=1/2), and one inch =25.4mm, so the inner diameter of the 4 branch pipe is 25.4/2=12.7mm, which is usually the inner diameter of the DN15 water pipe

4 is the name of the diameter and length of the British system pipe, that is, 1/2 inch, which is equal to 15mm of the metric system

1 inch is equal to 8 minutes, 25.4mm of the metric system

6 points =3/4 inch =20mm

4 points =1/2 inch =15mm

in addition, remember that pipes are calculated based on the inner diameter, but the screw threads of pipes are calculated based on the pitch diameter, which is expressed by the drift diameter DN. The threads are divided into metric m and British g. the pipe threads are generally British, with a thread angle of 55 degrees and metric 60 degrees

specification of toilet sewer pipe

specification of sewer pipe 75 and 90 refers to the nominal outer diameter DN. Don't go to the corresponding points. Generally speaking, the "fraction" and "inch" are corresponding to welded steel pipes. Because the threads processed on the pipes are inch threads during the processing of welded steel pipes, there is a "fraction" and "inch". PVC-U downpipes are bonded, so there is no such title as "fraction" and "inch". Add: PVC-U pipe with an outer diameter of 90mm is called 90 PVC pipe. If the PVC-U pipe is connected with the drainage cast iron pipe, the corresponding specification of the drainage pipe is dn75. In the technical exchange, it is inappropriate and more directly wrong to call the PVC-U pipe with a nominal outer diameter of dn90mm 75. As a matter of fact, the drainage pipe connected with the toilet should be dn110mm, and it is inappropriate to use dn70mm and dn90mm. There is no rigid standard. Now the bathroom generally uses PVC pipes with an inner diameter of 110

specification of toilet downpipe

size of toilet downpipe, generally 300mm, 350mm, 400mm, 450mm, etc. To choose a suitable toilet, you must first choose the appropriate size of the sewer pipe. When choosing the toilet, if you are going to decorate and paste tiles, you must measure the pit distance after pasting tiles, otherwise you will have the problem that the toilet can't be installed when you buy it back. Generally, reserve a clean wall and toilet: 300mm from the back to the wall, and no less than 500mm from the side (the center distance of toilet is generally the following common specifications -- 200, 220, 280, 300, 320, 350mm). Conventionally reserved clean wall surface, squatting stool, 650-700mm from the back to the wall (the flushing pipe is a little short and needs to be extended further), and the side is not less than 450mm

general steps of sewer installation

Step 1. Material acceptance

the quality of construction materials directly affects the construction quality and the hidden dangers caused by poor materials in future use. Before installation, the water pipe should be strictly checked. The inner and outer walls of the water pipe should be smooth and flat, without bubbles, cracks, cracks, depressions, peeling, serious cold spots and obvious traces

step 2. Site disclosure

the installer should carefully read the drawings to confirm the location of water heaters, sinks, basins, washing machines and other facilities and equipment, and understand whether the owner or designer has special requirements. If there are special requirements, the construction should be carried out according to the owner or designer's instructions

Step 3. Pipe cutting

in order to avoid unnecessary waste during installation, the installer should measure the length of the required pipe and cut it. The pipe cutting adopts special pipe scissors. The bayonet of the pipe scissors should be adjusted to match the diameter of the pipe being cut. The force should be applied evenly during the rotary cutting. When the pipe is broken, the section should be perpendicular to the pipe axis. After the cutting, the fracture is round and the section is free of burrs

Step 4. Pipe connection

PPR water pipes are connected with pipe fittings by hot melting, which is the most reliable, easy to operate, good air tightness and high interface strength. Before connecting, remove the dust and foreign matters on the pipes and accessories. The pipes and fittings shall be heated by welding machine, and the hot melting depth and time of pipes and fittings shall meet the requirements. Do not rotate during hot melt welding. When connecting the threaded pipe fittings, wrap the raw material tape to ensure sealing

step 5. Pipe fixing

in order to ensure that the water pipe will not resonate due to water pressure in future use, all water pipes must be fixed with pipe clamps. Pipe clamps with a spacing of 400-500mm and an outer diameter of less than 25mm shall be set at the corners, water meters and 100mm at the pipe terminals. In case of special circumstances, the thickness of mortar landfill for water pipes that go through the trench should be > 100mm。

installation method of toilet downpipe

before installing the downpipe in the toilet, first check whether there are damages, cracks and other phenomena in the water pipe of decoration building materials and related connecting accessories. When installing the sewer pipe in the toilet, the constructor should consider the thickness of the wall brick in advance

try to use less or no connecting accessories on the wall and under the ground, so as to reduce the hidden danger of leakage, and the installation of connecting accessories should be firm and free of leakage. When installing the sewer pipe in the bathroom, we should consider the installation position of the faucet of the washing machine at home, the layout of the sewer, etc. at the same time, we should also pay attention to whether the position of the power socket is appropriate

installation method of kitchen sewer

installation of sewer at the lower drainage. The lower drainage is that the drain outlet is on the ground, the sewer passes through the floor vertically, and the pipe directly leads to the downstairs. I am used to installing the lower drainage. In this way, if there are other sewers, I can share a return bend to make the sewers. Generally, 50 return bends are used for the sewers. If there are other sewers, add tees, and use the inclined tees on the way above, In this way, the water flows smoothly. Most of the time, the kitchen drainage is relatively complex, and sometimes they all go around. The main reason why the waterway is difficult to do is that the place is too small, and there are other electrical appliances in the cabinet, such as garbage disposal, kitchen treasures, water purifiers, etc., and some are connected to washing machines

install the downpipe at the side drainage. The downpipe of the side drainage is on the main pipe of the kitchen. Above the ground, part of the downpipe leads to the main pipe horizontally. The lower drainage has a return bend under the building. If a return bend is installed on the floor, it is double odor proof, while the side drainage is that the sewer pipe is connected horizontally in the main sewer pipe, and generally only one return bend can be installed. After installing such a sewer, connect a 45 degree elbow on the horizontal pipe, and then connect half of the return bend, but note that this return bend must be triangular, and the circular one is not easy to connect, and finally connect other pipes. Generally speaking, the side drainage is not as smooth as the lower drainage

waterway acceptance method of upper and lower water pipes

1. The direction of upper and lower water pipes should be reasonable, and the pipe layout should be horizontal and vertical, without too many corners and joints

2. Conduct the irrigation experiment with the newly made downpipe, and the drainage is smooth, and the pipe wall is free of seepage and leakage

3. The water outlet elbow of the hot and cold water pipe should be on the same plane and at the same height, hot on the left and cold on the right, with a distance of 10~15cm and directly above the water outlet

4. Pay attention to the protection of finished products after the completion of the downpipe to prevent the loss caused by the secondary impact of human foreign bodies

5. The drainage test of the sewer pipe shall be carried out, and the water shall be smooth without water leakage and flashing

6. There is no hard scratch on the surface of the pipe and no dead bend on the hose

7. The water supply pipe should be subjected to a pressure test, the pressure is generally 0.6 MPa, and there is no leakage after being closed for 24 hours

8. The pipeline must be installed firmly, and there must be no shaking or loosening after water is connected, and there must be no leakage at the connection

9. Finally, don't forget to ask the construction team to leave the wiring diagram, especially the dark line, and be sure to leave the accurate wiring and electrical wiring diagram in case of urgent repair

editor's summary: the above is the introduction of the relevant knowledge about the installation and acceptance methods of household sewer specifications. I hope it can help friends who need it in this regard! If you need more relevant information, please continue to follow our website, and more wonderful content will be presented in the future. You can also go to Qijia mall to buy your favorite products





Copyright © 2011 JIN SHI