The official name of PPR pipe is random polypropylene pipe, which is the most widely used water supply pipe in home improvement project at present. The pipe joint of %D%APPR adopts hot-melt technology, and the pipes are completely fused together, so once it passes the installation and pressure test, it will never leak water again, with high reliability. However, this does not mean that PPR water pipes have no defects, poor high temperature and pressure resistance, and the long-term working temperature cannot exceed 70℃; Each section is limited in length and cannot be bent. If the pipeline is laid for a long distance or has many corners, a large number of joints will be used in the construction. Tubing is cheap, but the price of accessories is relatively high. From the comprehensive performance point of view, PPR pipe is the pipe with high cost performance at present, so it has become the first choice for the renovation of home decoration water pipes. %D%A PPR tubes sold in the market mainly have two colors, white and gray. Why is there such a difference? The dealer's answer is that the raw material PPR particles used are different. %D%A General hydropower renovation will replace the original water pipes. Home improvement companies and merchants choose hot water pipes when suggesting that decorators install PPR pipes, even where cold water flows. Their argument is that because the technical parameters of hot water pipes are higher than those of cold water pipes, the price difference is not big, so hot water pipes are used for waterway reconstruction. Another fact is that even if you want to buy cold water pipes, it is difficult to buy them in the market, because cold water pipes only supply the tooling market, not the home improvement market. %D%APPR: It's a kind of pipe-it's a kind of pipe that is sold more in the market at present. PPR pipe can be used as both cold water pipe and hot water pipe. Its advantages are environmental protection, sanitation and cheapness. The price of domestic PPR is slightly more expensive than that of imported PPR. Its disadvantage is that the construction needs professionals and the hot melt technology is high, otherwise it is easy to leave hidden dangers. In addition, the performance of domestic PPR raw materials is quite different from that of imported materials (only the imported PP materials from Nordic Chemical Industry meet international standards), and the long-term performance needs to be verified (according to an article written by an official from the Ministry of Construction). There are too many brands now, and the quality is uneven. %D%AUPVC pipe: Actually, it is a plastic pipe, and the joints are usually glued. UPVC pipe has poor frost resistance and heat resistance, so it is difficult to be used as hot water pipe. Because its strength can not meet the pressure requirements of water pipes, cold water pipes are rarely used. In most cases, PVC pipes are suitable for electric wires and sewage pipes. In addition, in recent years, the scientific and technological circles have found that phthalein, a chemical additive that can soften PVC, has a great influence on the kidneys, liver and testicles in the human body, which will lead to cancer and kidney damage, destroy the human functional reconstruction system and affect development. So I advise you not to buy it.