Thermaltake16 mm Pacific C-PRO G1/4 PETG Tube OD Compression - White (Pack of 6)

These are the best fittings I've ever used, never had a leak and they are totally fool proof. They are pricey but then again they are very well made, beat the normal push fit hands down.

My previous WC builds used bitspower fittings, but I wanted to check those. Just to see if they are easier to use like they say.They are large, so you have to take this into consideration visually and with space (in some places I had to use extension fitting as there was no space for c pro fitting ditectly).I must admit it was very easy to build WC setup using those fittings. Just to add I used 16 size and thermaltake petg tubes to match.I had only one leak, which was my fault as fitting top wasn't screwed tight enough to bottom part. I corrected it and there was no issues at all. If you don't make sure this is tight, there is no proper sealing (there is only one oring that holds both pieces of the fitting together, so it has to be squeezed properly to seal, all other o rings are making sure fluid is not leaking between tube and fitting).

Great product with free delivery which makes the difference