3/5-layer PEX-A pipe is a type of pipe commonly used for plumbing and heating systems. This type of pipe is called 'PEX' which stands for 'cross-linked polyethylene' and is known for its flexibility and strength. The abbreviation 'A' stands for 'cross-linked', which indicates that the material has been chemically modified to make it more resistant to heat and pressure.
The 5 layers refer to the structure of the pipe, which usually consists of:
1 Inner layer: This layer is in direct contact with water and is usually made of cross-linked polyethylene (PEX-A) which is suitable for contact with drinking water
2 Adhesive layer: This layer helps adhere the inner pipe to the outer layers to ensure a tight seal.
3 EVOH layer: Oxygen barrier useful for protection and preservation from deterioration
4 Other adhesive layer: This layer further contributes to the seal between the layers.
5 Outer layer: The pipe is protected by an outer layer, often made of high-density polyethylene, which provides additional protection and resistance to wear.