X2 on what old-biscuit said...a sharkbite fitting, no crimper needed and it will take longer to read this thread than fix it! I get mine from Home depot - they also stock pex, if you need a new piece. I got a 10' piece, put a 90° elbow on my fresh water drain and ran the drain to the curb side of the trailer, rather than between the the tires on the street side, at finger tip distance. A new toilet...shark bites. A new water heater at home - sharkbites on flex copper. Change out the water heater in an hour.
Oh - you could get a Dremel, cut off the old crimps and just use the 90° sharkbite - done!