I would take that statement with a grain of salt. In any retirement village (not just Rymans) it is the responsibility of the village provider to fix any building maintenance issues - no matter whether we talk about the independent living "villas" or the care units. Would not make any sense for them to get low quality plumbing - they would need to pay for all follow up cost (which could be substantial). No cost to the occupier (this is all covered by the DMF).
Been last week through a Rymans village - and while I obviously didn't open the walls to check the plumbing ... what one can see looks clearly upmarket.