Hal is right about getting 90 degree sweeps, or manufactured 90's as some call them, from your supplier. If you want to save some money, down the road that is, next time you come across another EC with a hydraulic pipe bender make some sort of a deal with him. I'm sure he'll be happy to make a few extra bucks to cover the cost of his bender. At the very least, it'll be one less big coupling you have to buy.
Andy