Counterflow chiller

Systems, Gear, & DIY
1

Looking to build a counterflow chiller.  I like the idea of a cylinder model with PVC piping as the cylinder and copper tubing inside.  Does anyone have any basic blueprints for an easy to build model or other recommendations.  Looking forward to a fun project.

2

http://www.homebrewtalk.com/wiki/index.php/How_to_make_a_Counter_Flow_Chiller

3

http://www.howtobrew.com/appendices/appendixC.html

all the way at the bottom of the page