The two PPR pipes have the same raw materials. The main differences are reflected in the following aspects:
Wall thickness: different wall thickness means pressure capacity is different, usually cold water pipe is 16 kilograms of hot water pipe is 20 kilograms.
Thermal conductivity: hot water pipes can pass cold water or hot water, but cold water pipes can not pass hot water.
This is also the reason why the price of cold water pipe on the market is lower than that of the hot water pipe.
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