Drain plug?

[Holabubu]

I"m going to build something like this http://cdn.overclock.net/b/bb/900x900px-LL-bb49d273_20.jpeg

ordered everything, xspc photon 170.But i'm thinking should i go for a drain? what parts would i need for a Valve. or should i just go for something like this.

http://www.amazon.com/gp/product/B00J26U3R8?psc=1&redirect=true&ref_=ox_sc_act_title_1&smid=A3SC7BPT5ZUZY6

It's the same case same rad position, only 1 gpu.

 

Valve i was planning on getting,

http://www.performance-pcs.com/alphacool-2-way-ball-valve-g1-4-chrome.html

but not sure how i would be connecting it?

 

Worth going for a valve more expensive ? 

http://www.performance-pcs.com/bitspower-bp-mvv-dwbk-mini-valve-deluxe-white-with-black-handle.html

[vong]

I'd get the Bitspower valve.

 

Parts depend on where you put the valve. If' you're gonna put it on the reservior then just a simple male-male fitting will do. If you plan to put it  I dunno, maybe on the bottom radiator then you'll need to 2 male-male fittings and a t block.