WhaleWatermaster/Aquasource - Truma/Filtapac Adaptor for Mains Water - EM9407

I am surprised as it being a Whale product that is an adapter to my whale pipe and whale filter. Only real issue I have is how the attachment has a tiny locating pin that has very often shot off the hose. Really needs re-designing to be more secure

Nothing to hold it into water inlet, keeps popping out even with low water pressure