How long is the general construction period for hydropower renovation of second-hand houses? What problems should we pay attention to?

1. How long does it take to rebuild the second-hand house? Generally, hydropower transformation takes about a week. Of course, don't worry when decorating, because these concealed works are very important, especially the water and electricity decoration, not only during the installation process, but also after the decoration.

1, apply to the community for a work permit. Before the renovation of the second-hand housing waterway, the commencement certificate should be issued to the residential area. When applying, you should bring a waterway reconstruction plan and wait for the approval of the residential property. After completion, the property management office needs to go to the site for acceptance.

2. Material transformation of water pipes As mentioned above, the inner wall of water pipes will form more scale in houses with long service life, which will affect the health of family members; Furthermore, galvanized iron pipes were mostly used in houses and were oxidized by water for a long time. After the pipeline is corroded, its compressive capacity decreases, which is easy to cause leakage or even fracture. Therefore, the second-hand house should choose whether to replace the water pipe according to the material and service life of the water pipe.

3. The closed water test is indispensable. Before the renovation of the second-hand house waterway, it is suggested that the space should be closed for water test before acceptance by the relevant property. If you find water leakage, you can find a property to solve it. In order to avoid leakage after transformation, the responsibility is not clear.

4. Water pipe hydrostatic test After the installation of second-hand housing water pipes, pressure test should be carried out on hot and cold water pipes, generally 6-8kg is appropriate, and the experimental pressure should not be lower than 0.6MPa for 20-30 minutes. If the pressure does not leak and the air pressure does not drop, it is considered qualified.

Second, what problems need attention.

1, asking about the service life of the house For commercial houses with a service life of ten years, the strong and weak current of most houses is not much different from that of new houses, and the circuit transformation should be mainly based on local changes; For the second-hand house that has been used for 20 years, the circuit transformation mainly needs to optimize and adjust the original high-voltage system; For second-hand houses that have been used for more than 20 years, the circuit transformation generally needs to remove the original wires for thorough rectification.

2. Check the quality of the original wire tube before the circuit transformation of the second-hand house. If the conduit is damaged, the original conduit cannot be used. If the conduit is well preserved, the wires in the conduit can be directly replaced. This can save the cost of wire and tube.

3. New sockets and circuits should be wired separately. If there is no problem with the quality of the original circuit, then there is no need to dismantle it, but some new lines and switch sockets are added on this basis to meet the more needs of the owners. However, it should be noted that the newly added power sockets and other circuits should be wired separately from the distribution box and cannot be connected at will. Avoid adding sockets and lamps to the original circuit, so as to avoid overloading a single circuit and causing tripping or even fire.

4. Ground wire protects old second-hand houses. The original socket circuit may have no grounding wire, generally only two holes, which does not meet the safety standards of shared electricity and must be replaced. One method is to replace the main power box and set the grounding in the power box; Another way is to consult the electricity management personnel of the property about the installation location and connection mode of the grounding wire, and never set the grounding wire privately. It can be seen that the renovation time of second-hand houses is generally about one week, but the specific renovation time depends on the actual situation, either less than one week or more than one week. At the same time, many matters need to be paid attention to in the process of hydropower transformation, such as closed water test.

The content of this article comes from: Questions and Answers on Home Decoration Knowledge of Building Industry Press.