I was wondering if any of you have built a rack from Pvc? I saw some nice racks at AP website and I thought about making one. I like the light weight but I dont know where to get materials for it.

If anyone has done this please help out? Also how do you run flex watt if the sides are open on the rack?? I want to make the rack expandable also. Say maybe 4 ft wide 3 ft high per rack would be perfect. That way I could just put a new rack on top of that when I need the space