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Both PE pipes and PPR pipes are two materials of pipes, and both can be used for water supply, so why do home improvement water supply pipes basically choose PPR water pipes, while PE pipes are mostly used in municipal pipes, and rarely used in home decoration water supply pipes. The reasons are as follows:

The nominal outer diameter dn of PPR water pipe fittings refers to the nominal outer diameter of the PPR water pipe connected to the water pipe. There is a requirement for the key wall thickness of PPR water pipes, which requires that it should not be less than the wall thickness of the same PPR water pipe series S pipe. In other words, the wall thickness of the pipe fitting must be greater than or equal to the wall thickness of the pipe.