Nice Project. Could you help us out a bit?
1) What is the model of water pump you're using?
2) Looks like custom water block solution. Is it replicable for us? How? Can we buy them?
3) What is the operating temperature you're achieving? Can you give us a screenshot?
4) Would love to know how loud the entire rig is. Surely the water pump makes noise, and the fans on the radiator make noise as well?
Looks like a great project, but I'd like to see the real results for "Frozen & Quiet." If it's true, I'd be the first one to buy 8 miners worth! It's either that, or I'm dunking them in mineral oil with a radiator. I can't seem to find anyone anywhere who's successfully cooled 8+ Antminer S9's with mineral oil, water cooling, or anything else portable.
I've got free utilities in my apartment and want to find the best way to get this done in a small footprint that's rather contained!
I'm very sorry to respond to you so long, always been busy recently, put this post to forget

1 . I use a small centrifugal pump, the model is SC-750, syscooling products
2 . You can contact syscooling at
https://syscooling.en.alibaba.com/3 . screenshot here
https://s1.ax1x.com/2018/01/26/pq0jEQ.png4 . SC-750 pumps and low-speed fans on the radiator are all very quiet and I think they are negligible; the miner fans speed dropped to 700 and 1300 RPM, the noise goes down too.