Originally Posted by Rollergold
I used Swiftech lok-seal compression's (3/8 ID 5/8 OD) and is it just me or was it ridiculously hard to actually screw the compression collars down over tubing by hand? I was struggling even get the threading on the collar to start connecting with the threading on the barb . I double checked I had the right size tubing and fittings but damn getting those collars even screwed 1/4 way down was a challenge. Maybe it was the size of the barb because I had some Koolence QDC's (whose O-rings were DOA but thats another story) with the same OD and ID ratting and I never needed the wrench or even dipping the tubing in hot water to fully screw down the collar on the Koolence fittings. I needed both to get even get the collar screwed 1/2 of the way down with the swiftech compressions, weird
I just got done with my build and I used all the Lok-Seal fittings as well. I had to use a different tubing because I couldn't screw the collars down at all on the fitting."XSPC High Flex PVC Tubing - 3/8" ID (5/8"OD) - Blue / UV Blue" is what worked perfect for me.
"PrimoChill PrimoFlex Advanced LRT Tubing 3/8"ID x 5/8" OD - Brilliant UV Blue" was such a pain in the ass to use, the ID was 1/8" smaller than 3/8 and I cut myself trying to get it on there once. After that I just gave up and ordered the XSPC and it worked like a champ.