Rifeng 5-layer PEX pipe is made up of five layers: crosslinked
polyethylene, adhesive, oxygen barrier, adhesive, crosslinked
polyethylene. The layers of adhesive bind the two layers of
crosslinked polyethylene to the central barrier layer by a thermal
reaction. The barrier layer is right in the center, this preventing
the pipe from being damaged by scratch and from reducing its
performance due to the moisture.
Multilayer PEX Pipe Images