Oxygen Barrier Pex Vs Non

The oxygen barrier is either applied on the outside of the tube as an evoh etylene vinyl alcohol copolymer layer or as aluminum sandwiched between layers of pex pex al pex.

Oxygen barrier pex vs non. Evoh doesn t allow oxygen through or allows it through in minute enough quantities to be considered close enough to zero. Pex al pex should have better oxygen barrier properties than evoh which simply slows the diffusion of oxygen. The polyethylene pex tubing is coated on the inside with the evoh so oxygen can t get into the liquid inside the tube and cause corrosion. The oxygen barrier tubing exudes a glossy appearance as the non barrier tubing resembles a matte.

Oxygen barrier pex tubing. Polyethylene is too oxygen permeable to meet the standard for an oxygen barrier. Pex plumbing pipe is a 1 alternative to copper and cpvc rigid piping for residential and commercial potable and non potable water plumbing applications. There is one major difference between these two types of pex tubing and that is an evoh polymer which is found in the oxygen barrier pex.

Technically most o2 barrier pex is the same as that company s non barrier pex with a barrier added typically to the outside or sandwiched in the middle of the pipe so there isn t a real reason not to use it. Non barrier pex overview flexible economical and easy to install non barrier pex tubing a k a. Non barrier pex primary difference between non barrier and oxygen barrier pex is external coating of special polymer evoh which purpose is to prevent gradual diffusion of o2 oxygen molecules into the water circulating in the heating system. This simple mechanism protects cast iron components of the heating system from rusting.

Though both methods are very adequate.