This is my chiller...
http://webcache.googleusercontent.com/search?q=cache:db9vX51tSugJ:www.williamsbrewing.com/STAINLESS-CONVOLUTED-COUNTERFLOW-CHILLER-P3452.aspx+&cd=1&hl=en&ct=clnk&gl=us
It says 12' long 1/2" OD. Yes I am running in opposite directions, i set it upright and the wort ran...