Originally Posted by wermad
May I ask how much you spent on the copper tube from mcmastercarr.com?
If you only spent ~$20, you probably bought 3/8". If you paid twice or triple, then you paid for 10mm. 3/8 is cheaper because of its imperial size and mcmastercarr is in the US. It has an id of 0.305" which is ~7.7mm. The 10mm has an id of 8mm.
This is one of the reasons I abandoned metric is the high cost of copper or acrylic tube here in the US.
Well, hope you find a solution
I bought a 10 meter (32.808 feet) coil of 10mm OD, 8mm ID copper tubing from McMaster-Carr for $108.74. That works out to $3.31 / foot.
If I bought the 3/8 inch OD, .277 inch ID copper tubing (the closest match for imperial), it would be $4.71 / foot for a 10 foot coil, or $2.36 / foot for a 50 foot coil.
I'm sure they charged me for the price of copper per pound plus their markup, but I'm not going to bother calculating the actual volume of copper per foot for each tube here.
The amount I paid wasn't "twice or triple" per foot for the metric as opposed to the imperial. The price I paid matches up with their scale: the 10 foot coil is more expensive per foot than the 50 foot coil. Since I bought a length that was in between those lengths, I paid a price per foot that fell in between the two.
Now, I probably didn't get the best price since I'm not "in the know" about this sort of thing, but McCaster-Carr is a mail-order supplier in my state. My order arrives the 2nd day after shipping.
If I can't get this to work, I'll try other sizes and fittings I can get locally.
I do appreciate your input.
BTW - I'm from San Diego too. I moved up the Nor Cal in 2011 for a job. Since all my friends and family are in San Diego, I go down there about once a month. I'd like to find software development work back down there. Edited by Escovado - 8/13/13 at 5:53am