On Nov 7, 3:59 pm, George wrote:
ransley wrote:

Clark, I see it as rated for 200f, but the site also says " for saftey
and conservation 140F". He can of course do it but it does fail, its
plastic. Radiant underfloor heating is around 110f and lower pressure
than a 185f boiler. My car is rated 5000 rpm redline, , but for long
life it never goes there. Metal is proven, Pex does not have a long
track record in years. nobody really knows how Pex will last at high
temps and pressure over 50 years++.

I don't understand the comment about underfloor heating running at a
different pressure. It typically uses 12 PSI just like other hot water
heating systems.

PEX has been in use for over 50 years. Cross linked polyethylene is a
well proven material.

Yea Pex is fine , im an idiot, but dont complain if anything goes
wrong..............in 80 years, or when you sell your
house.................