Okay, since they did use the purple primer, I would assume it is going to be near impossible to actually break the joint loose. The purple is a way to start the PVC melting process before the solvent is used. It makes the PVC softer and that really makes it melt totally together when it gets done.
IF (big IF!) one is dedicated enough he "Might" be able to salvage the fittings by slowly, carefully sanding /grinding the parts off but it does really get iffy to try it. When both primer and solvent have been used the two parts are nearly the same and it is going to be really hard to tell where one stops and the other begins. An actual weld, not just a glue job.