In an earlier contribution to this discussion,
Peter Lynch wrote:

I'm planning to replace a radiator in my conservatory, which is tee'd
off the main CH circuit. Now there will some time (a few days) between
chucking the old radiator and installing the new, smaller, one.

The plan is to freeze the pipes after the tee junction, cut the pipes
and put some "cupro fit" compression stop ends over the pipe ends.
Then, when the new rad. appears re-freeze, remove the stop ends and
plumb in the pipework with straight couplers onto the open ends.

Now, about the preparation of the pipes before I cut them: they are
currently painted over. I plan to remove the paint with fine wire-wool
and use a circular pipe cutter to make the cuts. Will this ensure
a good enough fit to the compression joints, and will I be able to
just pull/twist off the stop ends when it's time to install the new
radiator? Or do I need to cut back the pipes further?

Your comments and suggestions would be welcome

Pete

Why no put an isolator valve on each pipe. You won't have to freeze it a
second time, then. If you want belt and braces, you can put end stops on as
well - and then re-pipe from the isolators onwards. Normal service valves
have bores which are quite a lot less than 15mm - but that won't matter
unless the pipes are feeding a really big radiator - say more than 3kW - in
which case full bore ball valves would be better.
--
Cheers,
Set Square
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