PVC pipe is an essential part of hydropower engineering and it is used to protect wires. Because of the protection of the line tube, the line can be laid. The live line is that the wire can be twitched. If the wire does not enter the pipe, the cement mortar is directly placed on it, and the wire is bonded to the cement mortar, and it cannot be twitched at all. This brought a lot of inconvenience to the subsequent daily maintenance and repair. In the future, if you want to repair, you can only remove the cement, which is too much trouble. Therefore, the use of PVC pipe is very important, and PVC pipe couplings are also very important. Let's talk about how to pick them.