Pex UV Exposure Concerns

It takes YEARS for UV to affect it. Relax, no harm done.

Don't worry about it. I would cover it up, but it won't rupture or burst unless it sat exposed for a few months/years.

I cover all my PEX lines with those black foam insulation pipe things not for the insulation but to keep them out of the sun.

To further support my concerns, see below.

Sounds like you already knew the answer to your question before you asked it.

I would not be concerned.

I live in the desert and during new construction PEX is exposed for periods of time; waiting for inspections.

From my Vanguard material: DO NOT INSTALL WHERE EXPOSED TO DIRECT OR INDIRECT SUNLIGHT FOR MORE THAN 60 DAYS. PEX tubing shall be stored under cover, shielded from direct and indirect sunlight when the material is stored for any length of time. Short exposure times, not exceeding a total accumulated time of 60 days maximum, are permissible.

-- Oren

"I don't have anything against work. I just figure, why deprive somebody who really loves it."

Take a couple of scraps of pex and sit them out in the sun. Check them every week. See just how long it will take to get any stiffening or cracking from UV. Four weeks is nothing, four years, maybe. This is not something that is damaged in a short time. Don't take my word, test some.

That's a good idea. I have a scrap piece that has been laying outside in my "spare" pile for a while. Maybe I will hook it up and see if it holds.