"John Stumbles" ] wrote in message
...

Marley Equator and Speedfit pipe is barrier
pipe. The other makers have two
types. Non-barrier and barrier. You need
the barrier pipe for CH. the none barrier is
fine for hot and cold water systems.

Well those stetson-wearing folks at the Hepworth ranch say:


"""""""""""""""""""""""""""""""""""""""""""""""""" """"""""""""""""""""""""""
"
If Hep2O Standard pipe has been installed in accordance with our
instructions in a central heating system and one of the recommended
inhibitors used there is no technical reason why it should not continue to
give good service for many decades.

Some of the British Gas regions only accept Hep2O Barrier Pipe on their
service contracts. This is their commercial decision. Of course British
Gas
no longer hold a monopoly on maintenance schemes for heating systems and
there are other insurance backed schemes available from various
organisations, which will accept both Standard and Barrier pipe.


"""""""""""""""""""""""""""""""""""""""""""""""""" """"""""""""""""""""""""""
"

It is when the inhibitor breaks down, then you get problems.

It is all silly. All
pipe should be barrier pipe then
there will be no problems.

If you can fit copper then do so, and
only fit plastic where it is required.
If speed and ease of installation is
the point then use copper with brass
push-fit fittings, which now are about
the price of plastic fittings.

They all use 'rubber' (EPDM or some such)
'O'-rings to make the seals,
whether they're brass, copper, stainless-steel
or plastic on the outside.

That is true. But!! Copper pipe does not sag when hot, neither does brass
fittings. No barrier problem, no ferrous plastic pipe inserts and it looks
better.



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