On Mon, 7 Sep 2015 16:21:05 -0400, "Mayayana"
wrote:

| PEX has been used in Europe for 50 years.


If you're going to make claims there should be
backup links. Simply saying so means nothing.
At Wikipedia they say it's been used in radiant
heat since the 60s, but nothing about how long
it's been in general usage for water supply pipes.

They also mention some issues with connectors.
(There were also problems at one time with radiant
heat hoses bursting, but that may not have been
PEX.)

As with the Ditra, there seems to be a lot of
hearsay, but I haven't found anything like 40+
years worth of statistics. Wikipedia mentioned
that PEX is *expected* to last up to 50 years,
providing it's not exposed to UV, excessive heat,
or chemicals that might break it down. (And who
came up with the 50 year figure? They don't say.)
It's only warranteed for 25 years.

https://en.wikipedia.org/wiki/Cross-linked_polyethylene


Try some research on PEX. Various kinds are used today underground for
natural gas lines from street to house gas meter, used in lawn
irrigation line only inches underground. All approved by local
building departments, in some localities. In the Mojave desert.

Use your old methods and then tell us the cost. Sure, PEX on a good
day can be exposed to UV for a short time, less than 30 days.

It aint "hearsay". Ed is correct about the 50 year use in Europe.

Prove him wrong.