Download of autopipes-2010--09-12.zip (autopipes-2010--09-12.zip ( external link: SF.net): 4,778,593 octetos) will begin shortly. If not so, click link on the left.
Pipes is a desktop system which analyzes an Autocad drawing of a sprinkler system, checks for flaws and after these are eliminated, adds the size/diameter labels to the drawing. Tutorial: http://users.norwoodlight.com/janh/wink/autopipes-entry.htm
