Thanks for the input.
The reason I got into this situation is that I am replacing the evaporator fridge that came in my camper with one of those small dorm style units. It fits under the counter but was sitting on top of the plumbing and wiring, which I decided to relocate. Space is tight and I will need to make two 90 degree turns to go around the fridge, so I guess I will need to use the CPVC and elbows that I have already purchased.
I went to Northeastern Plumbing Supply in Elkton and they told me that the plastic pipe in my trailer has not been in production for a number of years (my trailer is 25 years old). Come to find out I was looking at the wrong numbers anyway. The outside diameter on the original pipe was 1/2 inch but the inside was 3/8. The CPVC pipe I bought (smallest they had at HomeDepot is 1/2 inch inside diameter and actually 5/8 on the outside. The original pipe is a kind of plastic that must be secured with a compression ring (can't glue it). Northeastern found a slip on pressure fitting that will work (not Sharkbites, but something similar). It will let me transition from 1/2 OD to 5/8 OD without using glue. I'm going to go ahead and cut and glue the parts using the CPVC and when the fittings come in Monday afternoon I'll just slip them on. Problem solved! (I hope).
Next time something like this comes up (and no sharp corners are involved) I'll know to use the Pex and Sharkbites.