SMEG DI6012-1 dishwasher - how to replace inlet valve / softener unit?

[Combouk]

Hi all, looking for a bit of help please. My dishwasher is constantly filling when off, there is a trickle of water coming into the main chamber from the air brake. This then floods the bottom which causes an error and constant pump when on.

I took it apart and can see that the airbrake is filling constantly, I think the issue is the inlet valve as we are in a hard water area so assume it is stuck open.

Does anyone know how to replace the inlet valve / the entire softener kit that includes the inlet valve? From what I can see, the bottom of the rear of the dishwasher is not removable and even when I released the salt container from the inner chamber, there didn't seem to be enough wiggle room to move it down far enough for the screwthread to clear the chamber.

Thanks a lot

 

[Combouk]

In case it helps anyone, the bottom tray is removable so I put the dishwasher on its side, unclipped the bottom tray and now there is plenty of room to maneuver.