Yes, it was that whole idea of crimping that did for PB in the US. PB (as
well as PEX) is still used in Europe with no problems at all, because we
never had to suffer those crimps. We use pushfit (with O-rings) and
compression joints. People are still worried by the O-rings perishing, but
there isn't even anecdotal evidence of failure.
But in Europe, PB is still used and has no record of failure. I'm not sure
it is a bad material, just that the typical original US implementation of it
wasn't good, leading to catastrophic failures, which got associated with the
base material rather than the botched design. Both PEX and PB are used
extensively over here.
AIUI, it was the design of crimp that caused the problems in the US. Whilst
I'm sure they've changed the design, you should be aware that the 30+ years
of experience and testing that has occured in Europe does not apply to these
You'll probably find that European installations generally use more modern
materials and techniques than US ones. Sometimes this is good (i.e. better
efficiency), sometimes bad (i.e. unknown reliability).
The Poly B pipe becomes brittle over time. I've had it snap off under pressure
my hand. The plastic fittings also got brittle and failed. The annealed brass
crimp rings with metal fittings were never the problem. Once you crimp them
stay tight. Most of the Poly B installations won't cause problems if you leave
Hmmm. I suspect there were some differences in design in the pipe as well,
then. Perhaps there are some additives in the pipework over here that
prevents this effect?
Also, the majority of our plastic pipe has a tiny metal tube embedded in it
to prevent entrained gas escaping/entering. This might also make a
Ned, I used WISBO Pex in the back room. Its not very good
when hooked up to Baseboard. Under Tile its Great !
I have it under Tile in the Bath and Foryea.....
BTW I'm changing my Company name to,
' Martin, Liddy & Gotti Plg & Htg.
An offer you can't refuse. ( Money or Woodchipper.)
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