Hi All, I'm in the process of doing a copper build and figured I would put up a preview and write down some tips before I forget them.
Firstly, you will need 16mm OD tube and fittings. This is not common in the UK but they are available from BES. The only 45 degree fitting is M/F, so you would need to use one with a straight coupler if you go down that route. The standard UK size is 15mm, DONT TRY USING THIS. I mocked up using scrap 15mm and it's extremely loose on the fittings. There's also 12mm but I wanted the chunkier look of 16. The fittings are cheap but it's £5 postage everytime from BES. Just order way more than you think you need, tees, 90s reducers etc as if you forget anything or your plans change, the postage stacks up.
I was originally going to try using all bends rather than solder fittings but you would need a 16mm pipe bender as the tube won't fit in a 15. I would stick with fittings as in hindsight, I think the tighter radius looks better.
There are no 16mm valves with compression fittings but you can adapt 16mm to 12mm and get a valve for that. I will be doing this for the fill/drain port.
Make sure you have good deburring tools. It's very easy for the copper to just slice chunks off of the O-Rings.
My plumber friend will be coming over tomorrow to solder it all.
Firstly, you will need 16mm OD tube and fittings. This is not common in the UK but they are available from BES. The only 45 degree fitting is M/F, so you would need to use one with a straight coupler if you go down that route. The standard UK size is 15mm, DONT TRY USING THIS. I mocked up using scrap 15mm and it's extremely loose on the fittings. There's also 12mm but I wanted the chunkier look of 16. The fittings are cheap but it's £5 postage everytime from BES. Just order way more than you think you need, tees, 90s reducers etc as if you forget anything or your plans change, the postage stacks up.
I was originally going to try using all bends rather than solder fittings but you would need a 16mm pipe bender as the tube won't fit in a 15. I would stick with fittings as in hindsight, I think the tighter radius looks better.
There are no 16mm valves with compression fittings but you can adapt 16mm to 12mm and get a valve for that. I will be doing this for the fill/drain port.
Make sure you have good deburring tools. It's very easy for the copper to just slice chunks off of the O-Rings.
My plumber friend will be coming over tomorrow to solder it all.


Last edited: