Function: There are blue and red marking lines on the PPR pipe, which are used to distinguish cold water pipes from hot water pipes.
The blue line on the PPR pipe is the cold water pipe. The cold water pipe is mainly used on the main road of the environment, or relatively speaking, the ambient temperature is relatively good in places where hot water is not needed. It is thin and cannot be used for hot water pipes.
The red line on the PPR pipe is the hot water pipe. The hot water pipe can be used as both hot and cold water. The wall thickness is thicker with the same specification. With continuous improvement, PPR hot water pipes are basically used as the main pipe of the house water supply pipe in practical projects.
