JG Speedfit Pex Barrier Pipe 22mm x 3m (Dia x L) White, is suitable for use in most plumbing and heating installations. Manufactured from Pex, which provides strength and hardness to the product. This barrier pipe can also be used with copper pipes to create plumbing systems. It is designed with 5 layers. The centre layer is a blue coloured oxygen barrier which prevents the ingress of air. Reduces the effect of corrosion on metal components.