It's been about 2 or 3 years since I put together a loop and I just finished ordering my parts for my new pc. The only thing I haven't bought yet are compression fittings and tubing. Mostly because I can't decide what size to get. I think 3/4 OD looks the nicest, but what wall thickness are you all using? I was looking online and saw a lot of 3/4OD 1/2ID tubing, but I remember 1/8th wall being stiff and difficult to work with (I used a lot of boiling water). Does anyone make 3/4OD 5/8ID tube? Does it work well? Or should I just stick with the 3/4-1/2?
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