What type of HDC compression fittings with copper?

[Clipperjay]

Hey guys I'm about to purchase some 1/2" -3/4" fittings for solid copper pipe work, so whats out in the market for hard copper?
Anyone actually use copper instead of hard plastic tubes?
I have old Alphacool G1/4 13-19mm which I can't use due to being soft pipe work.
So HDC compression fittings on G1/4 would be 1/2"(13mm) ID 3/4"(19mm)OD correct?
The pipe work I've used is 15mm so 13mmID should be okay restriction not being too harsh throughout the system?
Thanks
Clip

 

[Warchild]

HDC fittings will be fine with copper tubing. Just make sure you chamfer the edges to about 45degrees or you will cut the rubber seals in the fittings.

Tubing size makes little to no difference on restriction, there is no change in flow either. As long as you have a good pump that provides great head pressure and you don't go over the top on angled fittings, which I assume you won't since I guess you will be bending the copper tube; then all will be ok.

Alphacool
EK
Bitspower
Monsoon
Barrow

They are all good and usable.