Quote Originally Posted by LogAn'sRun View Post
Not to be picky, but THAT is actually what he said later on; which wouldn't be the 3/8"ID 1/2"OD, it would be slightly larger. But this is just nit-picking right?
The choice of wall thickness has to do mainly with turning radius. The larger the wall thickness the less problems with making sharp bends and having the tube collapse. I think someone else also mentioned less problems with transfer of coolant through the tubing wall. I believe that was what Cathar was discussing when he wanted a 8mm ID with a 12.x OD.

In my use of 6mm x 8mm tubing you have to be careful what kind of tubing you use as mentioned by R1ckCa1n. Actually I was the one who encouraged Sharka to get the Mazzer PUR tubing due to it's higher flexibility. The test sample that was sent worked very well with push-fits. Unfortunately the roll of production tubing shipped was wound very tight on a small roll and it malformed the tubing in such a way that negated the use of it in a push-fit environment. The stuff AC sells (have no idea what their supplier is, but suspect it is Legris) is a PUR with a limited bend radius and a shore hardness that makes it ideal for its intended application.