Who is responsible for the leakage of sewer pipes? What are the methods to detect the leakage of sewer pipes? Please elaborate.

It's still very troublesome to repair the water pipe leakage, because many water pipes are hidden in the wall, and the maintenance methods of water pipes with different materials are different. 1. First, close the main gate. Then, use hoses to fix them at both ends of the hot and cold water pipes. 2. At the same time, fix one end of the instrument on another water pipe in the same space. 3. When using the instrument, the teacher should tighten every interface to prevent air leakage and make the measured water pressure accurate. When everything is ready, you can prepare for pressure test. 5. Increase the water pressure and test the water pipe pressure to see if the water pipe leaks. 6. The inspector raised the water pressure. According to popular parlance, the water pressure at this time is 8 kg. 7. Check the water pipes everywhere to see if there is any water leakage. The inspector touched the water pipe with his hand to see if there was any dripping water. The whole water pressure measurement process takes 30 minutes. If there is no water leakage, there is nothing wrong with the pipeline.