Why do water pipes freeze?

1. Because the buried water pipe can't directly contact the water pipe, it can only be thawed by pouring boiling water into it. Of course, hard steel wire can also be used to poke the water pipe, which can sometimes play a very good role in dredging the water pipe.

2. In the cold winter, turn on the tap a little at night to let the small water flow out continuously, which can achieve a good anti-freezing effect.

Generally, this happens in the north. Under normal circumstances, water pipes exposed in winter should be wrapped with thermal insulation materials and buried underground. Take this into account when burying, and bury it deeply.

Extended data:

Several reasons of water pipe freezing.

1, water does not flow for a long time, such as fire pipes, which are not used for a long time and have water inside, and are generally designed below the permafrost. This is a typical result of water not flowing.

2. One place where the water pipe freezes is from the valve well. If the valve well is not closed tightly, cold air will enter. Generally, water pipes are designed under frozen soil, but valves may be on frozen soil. First, the valve in the valve well conducts cold air, which leads to freezing. Finally, the ice conducts cold temperature, which makes the water pipes under the frozen soil layer freeze.

3. Another place is what we commonly call "climbing pipe" freezing, that is, the water pipe extending upward from the frozen soil layer to the surface. Because this water pipe is in the frozen soil, generally about two meters, this water pipe is the easiest to freeze. Although there are external insulation measures, freezing is not excluded. Generally speaking, this part of the pipeline is frozen.