1. PPR pipes, steel-plastic pipes and copper pipes are generally used for water pipes for home decoration. The price of steel-plastic pipes is relatively high, while the price of PPR pipes is higher than that of steel-plastic pipes. The price of copper pipes is the most expensive, and the price is equivalent to PPR pipe. About 4 times. 2, home decoration laying pipes should try to avoid laying from the ground, preferably from the top or wall, the pipe usage may increase slightly, but it is conducive to future pipeline maintenance. 3, the wall thickness of the hot and cold water pipe is not the same, the cold water pipe can not be used as a hot water pipe, the simple method of distinguishing the hot and cold water pipe is that there is a red line mark on the hot water pipe. 4, the standard length of PPR pipe is four meters each. When buying, please ask the price of each pipe or the price of pipe per meter. After the pipe is sent, remember to check whether the length of the pipe meets the requirements. 5, the water pipe for home decoration should pay attention to the pipe diameter and wall thickness, the general pipe should use 6 points, the pipe can be used to 4 points, in order to ensure the water consumption, the pipe can also use 6 points. 6, when the home decoration purchase pipe, pay attention to whether the inner diameter of the pipe is symmetrical, the uneven diameter of the pipe diameter will affect the docking of the two interfaces. 7. The "Construction and Decoration Engineering Quality Standard" of the Building Decoration Industry Association has such a regulation on the time and pressure of the pressure test: the newly installed water supply pipeline must be subjected to the pressure test in accordance with relevant regulations. The test pressure of metal and its composite pipe is 0.6MPa, the voltage is regulated for 10 minutes, the pressure drop inside the pipe should be no more than 0.02MPa, no leakage; the test pressure of plastic pipe is 0.8MPa, the voltage is regulated for 20 minutes, the pressure drop inside the pipe should be no more than 0.05MPa, no leakage.