u/BlindChicken69

What is this pin used, what does i.c. stands for?

I was picking components for my new build, wanted to use Aqualis XT 880 in my build. I picked this res as my plan includes a fill port connection from the top, return line from the top, and also wanted to have also a membrane fitting (not saying it's needed, just something I like to have).

I was told by the shop I ordered my components from, that Aquacomputer decided to stop making XT models, so now I'm looking at other options. For now I was looking at Heatkiller Tube multiport option (but somehow route return to the bottom of the res). I know Alphacool makes a res with three connection on the top (Eisbecher), but apparently they are so close you can't use them at the same time.

Anyone knows about other options?