4. Generally, the water distribution pipe is English 1/2 inch water pipe. The outer diameter of threaded joint washer is 20mm, and the inner diameter is 10mm. The so-called 4-point gasket means that the diameter (inner diameter) of the pipe is 4 points. Take every 1/8 inch as one point, two points as 1/4 inch, four points as 1/2 inch, and so on.
Precautions for water pipe installation
1 First of all, before the installation of water pipes, calculate the usage of water pipes to avoid the situation of buying more and wasting less, thus affecting the construction progress. Moreover, after the water pipe is installed, it is best to keep an installation drawing for later maintenance.
2. Secondly, if it is the renovation of water pipes in old houses, it is best to replace all the pipes, otherwise there will be problems in the later stage, and it is not excluded whether the pipes are new or old. Moreover, when installing kitchen and bathroom pipes, the size of the pipes out of the wall should be related to the thickness of the bricks.
3. Before installing the water pipe, check whether the water pipe and fittings are damaged or leaked, depending on the connection. Only after the test is in good condition can it be installed. And the main valve of the water inlet pipe should be set indoors. When the water pipe is buried in the wall, it is best to have too many connecting fittings to prevent the hidden danger of water leakage.