You can download free full version demos of CADPIPE's line of products that
allow you to quickly draw & design pipe, hvac sytems..these products are spec
driven and create a full bill of material, & more....these full working version
are good for 25 days....versions are available in R14 and 2000....a quick run
through the tutorial will provide you with enough to use the package quite
proficiently..saving you much time....the software can be downloaded from..
http://www.cadpipe.com