I've opened up the wall to change out the old cast iron DWV pipes in the laundry, got to the washer P Trap and noticed the old cast one is very short compared to the new ABS one I bought. (They are both 2") There is no room for the new one. The original one piece cast iron one takes up 6.5" and the new, 2 piece ABS one takes up 9.5". Are there 1 piece ABS one available that are 6.5" and code compliant?