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Thanks Mal and sprezzatura. Went the ebay route - nevertheless thanks sprezzatura for checking your scrap inventory! Barring mistakes with bending and brazing, I should have a little left over ... if anybody else runs into the same predicament.
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I’ll have a look around and see if anyone else has some 12mm
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Thank you kindly sprezzatura. That would be perfect for the shorter thermosyphon pipe, but I won't impose on you for it yet because I will still need to source a longer piece for the other pipe - will let you know how I go.Originally posted by sprezzatura View Post12mm OD with PTFE olives & 1/2” BSBP female caps. Overall 380mm usable.
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A 5% reduction doesn't need anything fancy, you can do it with a torch, a hammer and a lot of patience.Originally posted by rustyfence View Post
unfortunately I don't have swaging kit at home. Reducing (rather than expanding) looks like it requires some serious gear?
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I found one piece - it’s in descale. I’ll send you an image tomorrow.
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Yes please, would appreciate it!Originally posted by sprezzatura View PostI’ll take a look in my brass/copper bin ??
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Hi sprezzatura, thanks for checking. Second hand is fine. 1x550mm and 1x350mm pieces would cover it, including allowances for bends and trimming the ends and brazing mistakes. A pic below of the original tubes, for interest.Originally posted by sprezzatura View Post
Hey! I might have some (not new). What length?
Hi Lyrebird, not very familiar with swaging and unfortunately I don't have swaging kit at home. Reducing (rather than expanding) looks like it requires some serious gear?
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Hey! I might have some (not new). What length?Originally posted by rustyfence View PostHi,
I'm making thermosyphon lines to replace some unserviceable ones as part of a La Pavoni pub rebuild at the moment. The old copper tubes were 12mm outer diameter, with compression (mushroom) fittings brazed on each end.
I've found some new end fittings of the correct (original) size, but I can't find a supplier of 12mm copper tube. Standard plumbing copper tube is 1/2", which is close, but too big for the end fittings.
Unfortunately most advertisements for "12mm" copper tube turns out to be 1/2" in reality.
Anyone know where I can source metric 12.0mm OD copper tubes suitable for espresso machines?
Thanks!
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More or less impossible to find 12mm in Australia but copper tube is easy to swage to size.
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Copper tube
Hi,
I'm making thermosyphon lines to replace some unserviceable ones as part of a La Pavoni pub rebuild at the moment. The old copper tubes were 12mm outer diameter, with compression (mushroom) fittings brazed on each end.
I've found some new end fittings of the correct (original) size, but I can't find a supplier of 12mm copper tube. Standard plumbing copper tube is 1/2", which is close, but too big for the end fittings.
Unfortunately most advertisements for "12mm" copper tube turns out to be 1/2" in reality.
Anyone know where I can source metric 12.0mm OD copper tubes suitable for espresso machines?
Thanks!

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