1, look at the shape. When purchasing water pipes, you can see whether the shape of the water pipes is geometric, deformed or twisted. Whether the surface of the water pipe is smooth and the color is uniform. Regular and qualified water pipes are printed with clear trademarks, specifications, production dates and other categories on the outer wall of the pipes. When buying water pipes, you should also check whether they have a hygiene license. A water pipe with a hygiene license means that the water pipe has passed the inspection of the health and safety department. If there is no hygiene license, this kind of water pipe cannot be used for the installation of water pipes in the living room, especially the installation of drinking water pipes.

2. Smell. Most water pipes are made of plastic, and plastic water pipes are mechanically extruded. Now some businesses are making huge profits, or their production technology is not good, and their pipes will use toxic plastics in their production. However, the water pipes made of toxic plastics can easily make the toxic substances in the water pipes flow into the room through the water flow, which can not guarantee the safety of people's water use. Unqualified and inferior water pipes generally produce irritating smell, so people should choose plastic water pipes without any smell when buying.

3. High performance and low performance. When people buy water pipes, they can also bend plastic water pipes by hand. If the plastic water pipe can be easily bent without breaking, it means that the water pipe is of high quality. For example, a good quality PPR tube can be bent into a ring without breaking. If the plastic water pipe breaks and becomes brittle when bending, it means that the quality of the water pipe is relatively low, and people should pay attention to it when purchasing. You can also take a small amount of plastic water pipe samples and put them into high-temperature water to see the degree of hardening. If the pipe softens at 60 degrees, it means that the quality of the pipe is low.

4. Channels for purchasing pipelines. It is best to buy water pipes in regular building materials companies or large building materials markets, so as to ensure the formal qualification of pipes. When buying pipes, we should also pay attention to check whether they are produced by the same manufacturer, and the expansion coefficient of pipes produced by different manufacturers is different. When installed and used, the pipeline is prone to damage due to expansion and congestion, resulting in water leakage accidents. When buying water pipes, you should also pay attention to asking for product service cards from merchants to avoid problems.