Replacing the Coolant??? Help

[Basic]

Its time to replace my coolant, how do i empty the water properly? Ive never done this yet.

Plz help

 

[SYL\X/3K]

i dont feel like writting it so u can follow his steps:
http://www.campbellassociates.ca/blog/CategoryView.aspx?category=Water Cooling

clean out your water block(s), hoses, pumps and radiators once a month or so since algae buildup in the water block can reduce or even stop the water flow.