water cooling system is very risky.. and may be an problem for the system.. though its very hardly insulated from water leaks... but still, here are some links
*www.xoxide.com/watcoolkit.html
*www.overclockers.com/articles1327/
*www.tomshardware.com/2004/06/30/hands_across_four_water_cooling_systems/index.html
*www.directron.com/cpu---coolers-cpu-coolers.html