John Rumm wrote:

ZeitGeist wrote:
Hi,

Are Speedfit fittings OK to join copper pipe in the hot water and
central heating system in a house? Nearest fitting would be about 10
feet from the boiler. Someone said to me that the heat might affect
them.

Some boiler makers warn about using plastic fittings within a metre of
the boiler. However anywhere else is fine for copper or plastic. Note
that cuprofit can only be used on copper.

--
Cheers,

John.

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The JG speedfit site has a very useful technical artical describing
how to use and where to use speedfit. It's not hard to find, is good
bedtime reading and consists of information rather than opinions.
However if it's an opinion you're after here's mine: It'll be fine.