I don’t know the official answer.
However, I have the Vibe and understand it has a 4 year warranty.
If I was to hand it back before the warranty was up, I would feel I had wasted tax payers money because it couldn’t be given to someone else second hand.
I guess there are circumstances under which the pump has to be returned regardless of cost.
What are you pump incompatibilities? Perhaps there are people on this forum who may be able to suggest options to overcome them.