Whale,
The more important question is whether or not the leaking toilet repair is claimable on your OC’s insurance policy. If it is a matter of maintenance then this will not be claimable on the OC’s insurance.
The only time that I have seen a successful claim for the replacement of a toilet pan is when it was impact damaged (accidentally of course).
I believe the question needs to be asked “how was the pan cracked?” and is the occupant responsible for any amount of excess?