Well, that saved £20....
Last time out, I managed to break the hinge, on the Whale water inlet, on the caravan. The cover latches the actual part with the pipe in place, against the pressure of water, rather a clumsy system, but it is what it is....
Replacement water inlet, of correct model, fitted with contacts for the 12v pump - £40. Model version without contacts for pump, £20. Difference in plastic moulding and etc., none. Ordered up the £20 version, and will simply transfer contacts across from the broken item.