Water fill Problem Hotpoint Dish Washer Deluxe Model DF 31 ?

Hotpoint Dish Washer Deluxe Model DF 31

Problem started with water inlet safety valve not letting enough water into machine, I tested coil on solenoid and found it open circuit. Coil changed, however, after changing coil only limited amount of water if any now entering machine and machine waiting for sufficient water to start washing cycle.

After fitting new coil to the machine it did run through washing cycle but took along time to fill and rinse, now it appears insufficient water is entering machine. I have tried the solenoid on a test lead with the water connected and solenoid works however solenoid dose pass water but not with any force. There is a small black pipe also connected to the solenoid housing looks like so kind of bellows / pressure switch not sure what this dose or if it can be part of the problem?

Any help would be most welcome

Regards

Brian