What exactly are you trying to achieve? that forge pipe replace the V pipe that is a common point of failure... all the plastic hard pipes shrink and crack causing leaks... honestly dude, bin it all off... it will cost you more to put right than it will to bin it all off despite what you have invested...http://c1552172.r72.cf0.rackcdn.com/15681_x800.jpg
not quite the same tuffty but i'm sure it can be achieved using the same or similar elbows