Easydrinker wrote:Try it my friend, you may surprise yourself.
Once you start joining pieces of copper, you will discover how easy that is..
He's right, give it a go.
Over the years I've done plenty of DIY domestic plumbing, almost entirely in 15mm, and mostly using solder ring connections. This is my first ever attempt at metal bashing and freeform soldering.

- Image1
So I found some 22mm pipe and polished it up a bit, then I cut off a couple of pieces, snipped them lengthways, opened them out by running an axe head down the crack and hammered them flat.

- Image2
Found a cone generation utility on i-logic.com/conecalc and marked out on what was the inside of the tube. Turned a taper onto a chunk of an old oak table leg to bash the cones around.
Needs a good bit of cleaning up, but it's watertight and I'm pretty pleased with my efforts.
Just need to bore a hole in another nice piece of oak to stand it in now. That should be the easy bit, except I've got nothing between 20 and 25mm drill bits. Sodding typical!