Pex tubing for Compressed air?

[Bernhard Lampert]

I did a google search on PEX and it would appear that it is not considered suitable for air applications. It is also noted that it is for indoor use and if stored outside should be covered. If the throw aways have been exposed to UV, etc. that might render them unfit for any application.

Depends on the particular type, some tubing has a secondary covering (it is usually white, depends on the manufacturer) that incorporates a uv block.

I also have a bunch of pex left over from a radiant floor install I did on my house. The tubing itself would work fine, but I decided against it. The tubing is not rigid enough, so it would make for a sloppy installation at least for exposed work.

Cheers,
Bernhard

[David G Baker]

There is a PEX type product designed specifically for air but I do not think that PEX designed for liquids is something I would want to use for pressurized air lines.
PEX lines are not expensive, it is the fittings that cost.