Very good ideas Sarah had :)) Great Video David and as always super interesting and informative :))

Thanks David.

I've been using water cooling in my system for more than 20 years. Flushing water cooling parts before use is a good idea, mostly for radiators than any other parts. Don't forget to fill and leak test your first custom loop before installing it permanently in your system fully filled with fluid. If you worked on your own vehicle might already know what to watch it out for. For your very first loop I recommend computer users making their first custom loop especially when they have zero experience working with coolant systems like those found on cars take the extra step of testing it outside of your system before hard mounting their custom loop. Remember it's ok if you have wait an extra day for fan or cable extensions. The easiest way I setup a custom loop is by installing all water cooling components and connect all the hoses then I unmount the cooling blocks from the CPU/graphics card/etc remove the cooling system from the chassis then I fill and run the pump outside of the case for a few hours. Air takes longer to remove from the system when not using a reservoir. When running your loop you might want to use propylene glycol with distilled water in a 50-50 style mix. If you are paranoid about things in your loop just get a G1/4 base line/ fuel filter. I used straight distilled water in my early loops without issue, but I had one loop develop bacteria and I switched over to PG and distilled water mix because it is what I had on hand, it prevents the fluid from getting cloudy or needing to be changed. I recommend against using any coloring or additives sold for PC gaming loops as you can just buy colored tubing these days instead. Avoid using UV lights if you want to run straight distilled water.