Minus 5 degrees Celsius. When the temperature drops to or below minus 5 degrees Celsius, it is best to slightly unscrew the faucet to make the water flow into a line after using water in the evening to ensure that the tap water flows in the pipes to prevent freezing at night. At the same time to do a good job of water storage preparation, preferably hot water, in order to avoid inconvenience to the next day’s life. On the frozen water pipe, you can take the first time to take self-help measures, blowing with a hairdryer, or wrapped in a towel and slowly poured with lukewarm water can not be directly baked with a fire or boiling water, so as not to cause the pipeline or the water table burst.

Water pipe is a water supply pipeline, modern decoration pipes are used to bury the wall construction, the classification of the water pipe has three kinds, the first category is a metal pipe, such as plastic-lined hot-plated cast iron pipe, copper pipe, stainless steel pipe, etc. The second category is a plastic-compound metal pipe. The second category is plastic compound metal pipe, such as steel-plastic composite pipe, aluminum-plastic composite pipe. The third category is plastic pipe, such as PB pipe, PP-R pipe. The “hidden project” is a very important issue, if the water pipe leakage and burst will bring irreparable consequences. In the past, pipes used for water supply were mainly cast iron pipes. Outdoor mainly sand cast iron pipe, indoor use is galvanized cast iron pipe. However, due to the use of a few years after a large number of easy to produce rust scale, breeding bacteria, a serious danger to human health