[Clive George]

"repro" wrote in message
...
Is there a conventional way to join new 12mm copper pipes to old imperial
1/2" ?
Is the difference too small to worry about ?
Would compression be better than soldered?
Opinions/wisdom welcomed

(I'll assume you meant 15mm, not 12mm - metric are outside diameter,
imperial are inside IIRC)

And for a followup, putting fittings on a pipe which has been expanded by
frost.

(ans: get a solder fitting, press a suitably sized socket into it to make it
larger. Maybe do this in a couple of stages)

(of course this won't work if 1/2" pipe is smaller - I don't know...)

cheers,
clive

[Guy King]

The message
from "repro" contains these words:

Is there a conventional way to join new 12mm copper pipes to old imperial
1/2" ?
Is the difference too small to worry about ?

Take a bit of each pipe to the plumbers' merchant and get an adaptor.

--
Skipweasel
Pay no attention to that man behind the curtain.

[repro]

Is there a conventional way to join new 12mm copper pipes to old imperial
1/2" ?
Is the difference too small to worry about ?
Would compression be better than soldered?
Opinions/wisdom welcomed
Ta
David

[Andrew Mawson]

"repro" wrote in message
...
Is there a conventional way to join new 12mm copper pipes to old
imperial
1/2" ?
Is the difference too small to worry about ?
Would compression be better than soldered?
Opinions/wisdom welcomed
Ta
David



15mm to 1/2" you can use the same Yorkshire fitting *
22mm to 3/4 you need an adaptor fitting
28mm to 1" you can use the same Yorkshire fitting


(* I wouldn't recommend endfeed as the 15mm socket is a tad tight on
the 1/2" pipe so nice that the solder is already in there)

AWEM

[repro]

(I'll assume you meant 15mm, not 12mm - metric are outside diameter,
imperial are inside IIRC)

And for a followup, putting fittings on a pipe which has been expanded by
frost.

(ans: get a solder fitting, press a suitably sized socket into it to make
it
larger. Maybe do this in a couple of stages)

(of course this won't work if 1/2" pipe is smaller - I don't know...)


oops, yes 15mm, sorry.
Thanks for the tip Clive.
David

[Andrew Gabriel]

In article ,
"Clive George" writes:
"repro" wrote in message
...
Is there a conventional way to join new 12mm copper pipes to old imperial
1/2" ?
Is the difference too small to worry about ?
Would compression be better than soldered?
Opinions/wisdom welcomed

(I'll assume you meant 15mm, not 12mm - metric are outside diameter,
imperial are inside IIRC)

And for a followup, putting fittings on a pipe which has been expanded by
frost.

(ans: get a solder fitting, press a suitably sized socket into it to make it
larger. Maybe do this in a couple of stages)

(of course this won't work if 1/2" pipe is smaller - I don't know...)

It is smaller. The difference is small enough that metric
fittings generally work on imperial 1/2" pipe. This is less
true for 3/4" where some form of adaptor is usually required
to 22mm.

--
Andrew Gabriel

[David Hansen]

On Tue, 19 Sep 2006 19:12:00 -0000 someone who may be "repro"
wrote this:-

Would compression be better than soldered?

In addition to the answer on soldered fittings, from memory with
compression fittings special olives are sold for 22mm fittings to go
on to 3/4" pipe but the other sizes will work as they are.


--
David Hansen, Edinburgh
I will *always* explain revoked encryption keys, unless RIP prevents me
http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54

[Ed Sirett]

On Tue, 19 Sep 2006 20:26:56 +0000, Andrew Gabriel wrote:

In article ,
"Clive George" writes:
"repro" wrote in message
...
Is there a conventional way to join new 12mm copper pipes to old imperial
1/2" ?
Is the difference too small to worry about ?
Would compression be better than soldered?
Opinions/wisdom welcomed

(I'll assume you meant 15mm, not 12mm - metric are outside diameter,
imperial are inside IIRC)

And for a followup, putting fittings on a pipe which has been expanded by
frost.

(ans: get a solder fitting, press a suitably sized socket into it to make it
larger. Maybe do this in a couple of stages)

(of course this won't work if 1/2" pipe is smaller - I don't know...)

It is smaller. The difference is small enough that metric
fittings generally work on imperial 1/2" pipe. This is less
true for 3/4" where some form of adaptor is usually required
to 22mm.

On the rare occasions I've come across 1/2" copper pipe I have found that
it is very slightly bigger than 15mm, so that fittings are hard to mount.




--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at http://www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html
Choosing a Boiler FAQ http://www.makewrite.demon.co.uk/BoilerChoice.html
Gas Fitting Standards Docs he http://www.makewrite.demon.co.uk/GasFittingStandards

[bof]

In message .uk, Ed
Sirett writes

On the rare occasions I've come across 1/2" copper pipe I have found that
it is very slightly bigger than 15mm, so that fittings are hard to mount.

Yup, I used to sand down the outside of the pipe and the inside of the
fitting but TBH it's a lot quicker and easier to keep some adapters in
the plumbing box.

--
bof at bof dot me dot uk