I know this, why are you introducing two extra fittings? Do you want low restriction through that part of the loop?
You will have similar bend radius either way with one being 90Â° and the other 180Â°.
How about this with a 45Â°/90Â° adaptor?
So if I get two 90 degree fittings and put it on GPU2, would there still be enough room to connect a small tube between that fitting and the T-connector?
The bridged thing (serial loop?)
Hot water out of GPU1 and into GPU2....
Parallel cold in both hot out both