Drain line help

[snokrystal]

I'm ready to plan my watercooling loop now and I really want a drain to line to help for future draining/cleaning. I'm thinking in adding a T junction at the lowest point of the loop with a drainage tube coming off the T junction. However I'm confused in what parts I would need to get this done, how would I cap the end of the drain line

I'm using 1/2" ID - 3/4" OD tubing with monsoon compression fittings. I would be very grateful if someone could tell me what parts I would need to add the T line with drainage to my loop

 

[snokrystal]

I'm looking at having a piece of tubing coming from the T piece itself. I'm using the 900D and due to health problems it wouldn't be safe for me to move/lift the case to allow drainage from below.

Good idea though

 

[snokrystal]

I didn't think of stagnant water in the tubing, so looking at these quick disconnects to fit into a T piece.
Am I looking at getting this :- http://www.overclockers.co.uk/showproduct.php?prodid=WC-077-KA
to join to one of these http://www.overclockers.co.uk/showproduct.php?prodid=WC-144-BP&groupid=962&catid=2589 ?

What about the piece to join onto when I want to drain?