Where to place drain valve in my water cooling loop? (image of the build is below)

jj_hennessy

Prominent
Feb 21, 2017
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Hey everyone! I am looking for a place to put a drain valve in my water cooling loop. I have a picture of the intended layout of the build in the Imgur link below. The blue lines are tubing, green circles are compression fittings, and the red things are 90-degree fittings. I am thinking of putting a splitter fitting coming out of the graphics card, and have one route be the drain and the other be to the reservoir. Let me know your thoughts!

dbNK9IS.jpg
 
Solution
as mentioned above, you want the drain port at the lowest point of your loop.
for practical reasons, I wouldn't do it on the GPU. If the pump is too high, i'd make an extension to the front lower part of the case.