Originally Posted by Ashcroft
3/8 or 10mm tube should be the smallest tube you use for several reasons. The best are in my opinion:
It closely matches the internal diameter of G1/4 fittings, which are of course the standard. Larger tube diameter does in theory allow lower restriction but because we use G1/4 fittings the loop will always have a bunch of 10mm taps setting the restriction.
Restriction caused by tube diameter increases by factors instead of linearly. Once under 10mm the restriction ramps up extremely quickly as diameter falls.
6mm (1/4") barbs you have are way more restrictive than 10mm barbs
Also: all centrifugal pumps like we use for water-cooling are non self priming. Self priming pumps are capable of moving air until water arrives from the res. A piston pump is an example of a self priming pump. They suck for flow efficiency though compared to centrifugal.
Makes sense. Short story: The 1/4 inch cpu block barbs that came with my block threw me off. I went with a somewhat better submersible pump. I'm going to get new tubing/fittings and do a quick comparison.
My fittings are 1/4'', which caused me to go to home depot and get some 1/4'' tubing ($7) 20 feet. I still have 10 feet of very poor 3/8'' tubing that kinks, real junk tubing I got off Amazon, $8 it's way to thin, it's not worth the hassle of sending back despite not being the item in the pic. I can still use that stuff for some testing later on. I'll end up grabbing some 3/8'' tubing and fittings via home depot, from what I've seen they really shine price and quality wise in this area, along with any adapters. So that's good to know.
If mixing steel and copper is a bad idea then why is every barb made of steel. (I'm guessing) I don't think this is an issue. Brass and copper idk. While this is not currently for a permanent system, I don't want to mix corrosive metals if I don't have too. I'm on a budget for a few reasons, money and I want to make something practical as a hobby. I could just buy some cheap radiators and call it a day, but that's not fun
. And eventually implement a new fanless case design I thought up around 5 months ago, again as a hobby but practical as a challenge. (No not my current 50 gallon fun) It's going to be a while, tight lipped on it atm, I'll have to make the parts myself or get someone who can weld it.
It looks like copper and brass are fine, I was asking about this because brass barbs are cheap at Home Depot.